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<div class="body_content"><br />
<table class="file_summary"><tr><td class="h">Filename</td><td align="left"><a href="file:///usr/lib/perl5/5.20.1/constant.pm">/usr/lib/perl5/5.20.1/constant.pm</a></td></tr>
<tr><td class="h">Statements</td><td align="left">Executed 80 statements in 894µs</td></tr></table>
        
        <table id="subs_table" border="1" cellpadding="0" class="tablesorter">
        <caption>Subroutines</caption>
        <thead>
        <tr>
        <th>Calls</th>
        <th><span title="Number of Places sub is called from">P</span></th>
        <th><span title="Number of Files sub is called from">F</span></th>
        <th>Exclusive<br />Time</th>
        <th>Inclusive<br />Time</th>
        <th>Subroutine</th>
        </tr>
        </thead>
    <tbody>
<tr><td class="c1">2</td><td class="c1">2</td><td class="c1">2</td><td class="c0"><span title="0.0%">31µs</span></td><td class="c0"><span title="0.0%">42µs</span></td><td class="sub_name"><span style="display: none;">constant::::import</span>constant::<a href="constant-pm-32-line.html#54">import</a></td></tr>
<tr><td class="c3">1</td><td class="c3">1</td><td class="c3">1</td><td class="c0"><span title="0.0%">10µs</span></td><td class="c3"><span title="0.0%">11µs</span></td><td class="sub_name"><span style="display: none;">constant::::BEGIN@24</span>constant::<a href="constant-pm-32-line.html#24">BEGIN@24</a></td></tr>
<tr><td class="c3">1</td><td class="c3">1</td><td class="c3">1</td><td class="c0"><span title="0.0%">9µs</span></td><td class="c3"><span title="0.0%">9µs</span></td><td class="sub_name"><span style="display: none;">constant::::BEGIN@2</span>constant::<a href="constant-pm-32-line.html#2">BEGIN@2</a></td></tr>
<tr><td class="c3">1</td><td class="c3">1</td><td class="c3">1</td><td class="c1"><span title="0.0%">6µs</span></td><td class="c2"><span title="0.0%">13µs</span></td><td class="sub_name"><span style="display: none;">constant::::BEGIN@39</span>constant::<a href="constant-pm-32-line.html#39">BEGIN@39</a></td></tr>
<tr><td class="c1">2</td><td class="c3">1</td><td class="c3">1</td><td class="c3"><span title="0.0%">5µs</span></td><td class="c3"><span title="0.0%">5µs</span></td><td class="sub_name"><span style="display: none;">constant::::CORE:regcomp</span>constant::<a href="constant-pm-32-line.html#constant__CORE_regcomp">CORE:regcomp</a>&nbsp;(opcode)</td></tr>
<tr><td class="c1">2</td><td class="c3">1</td><td class="c3">1</td><td class="c3"><span title="0.0%">4µs</span></td><td class="c3"><span title="0.0%">4µs</span></td><td class="sub_name"><span style="display: none;">constant::::CORE:match</span>constant::<a href="constant-pm-32-line.html#constant__CORE_match">CORE:match</a>&nbsp;(opcode)</td></tr>
<tr><td class="c3">1</td><td class="c3">1</td><td class="c3">1</td><td class="c3"><span title="0.0%">4µs</span></td><td class="c3"><span title="0.0%">10µs</span></td><td class="sub_name"><span style="display: none;">constant::::BEGIN@126</span>constant::<a href="constant-pm-32-line.html#126">BEGIN@126</a></td></tr>
<tr><td class="c3">1</td><td class="c3">1</td><td class="c3">1</td><td class="c3"><span title="0.0%">4µs</span></td><td class="c0"><span title="0.0%">57µs</span></td><td class="sub_name"><span style="display: none;">constant::::BEGIN@4</span>constant::<a href="constant-pm-32-line.html#4">BEGIN@4</a></td></tr>
<tr><td class="c3">1</td><td class="c3">1</td><td class="c3">1</td><td class="c3"><span title="0.0%">3µs</span></td><td class="c0"><span title="0.0%">22µs</span></td><td class="sub_name"><span style="display: none;">constant::::BEGIN@6</span>constant::<a href="constant-pm-32-line.html#6">BEGIN@6</a></td></tr>
<tr><td class="c3">1</td><td class="c3">1</td><td class="c3">1</td><td class="c3"><span title="0.0%">3µs</span></td><td class="c3"><span title="0.0%">9µs</span></td><td class="sub_name"><span style="display: none;">constant::::BEGIN@64</span>constant::<a href="constant-pm-32-line.html#64">BEGIN@64</a></td></tr>
<tr><td class="c3">1</td><td class="c3">1</td><td class="c3">1</td><td class="c3"><span title="0.0%">3µs</span></td><td class="c3"><span title="0.0%">10µs</span></td><td class="sub_name"><span style="display: none;">constant::::BEGIN@3</span>constant::<a href="constant-pm-32-line.html#3">BEGIN@3</a></td></tr>
<tr><td class="c0">3</td><td class="c0">3</td><td class="c3">1</td><td class="c3"><span title="0.0%">2µs</span></td><td class="c3"><span title="0.0%">2µs</span></td><td class="sub_name"><span style="display: none;">constant::::CORE:qr</span>constant::<a href="constant-pm-32-line.html#constant__CORE_qr">CORE:qr</a>&nbsp;(opcode)</td></tr>
<tr><td class="c3">0</td><td class="c3">0</td><td class="c3">0</td><td class="c3"><span title="0.0%">0s</span></td><td class="c3"><span title="0.0%">0s</span></td><td class="sub_name"><span style="display: none;">constant::::__ANON__[:159]</span>constant::<a href="constant-pm-32-line.html#159">__ANON__[:159]</a></td></tr>
<tr><td class="c3">0</td><td class="c3">0</td><td class="c3">0</td><td class="c3"><span title="0.0%">0s</span></td><td class="c3"><span title="0.0%">0s</span></td><td class="sub_name"><span style="display: none;">constant::::__ANON__[:175]</span>constant::<a href="constant-pm-32-line.html#175">__ANON__[:175]</a></td></tr>
<tr><td class="c3">0</td><td class="c3">0</td><td class="c3">0</td><td class="c3"><span title="0.0%">0s</span></td><td class="c3"><span title="0.0%">0s</span></td><td class="sub_name"><span style="display: none;">constant::::__ANON__[:177]</span>constant::<a href="constant-pm-32-line.html#177">__ANON__[:177]</a></td></tr>
<tr><td class="c3">0</td><td class="c3">0</td><td class="c3">0</td><td class="c3"><span title="0.0%">0s</span></td><td class="c3"><span title="0.0%">0s</span></td><td class="sub_name"><span style="display: none;">constant::::__ANON__[:40]</span>constant::<a href="constant-pm-32-line.html#40">__ANON__[:40]</a></td></tr>
<tr><td class="c3">0</td><td class="c3">0</td><td class="c3">0</td><td class="c3"><span title="0.0%">0s</span></td><td class="c3"><span title="0.0%">0s</span></td><td class="sub_name"><span style="display: none;">constant::::__ANON__[:41]</span>constant::<a href="constant-pm-32-line.html#41">__ANON__[:41]</a></td></tr>
<tr><td class="c3">0</td><td class="c3">0</td><td class="c3">0</td><td class="c3"><span title="0.0%">0s</span></td><td class="c3"><span title="0.0%">0s</span></td><td class="sub_name"><span style="display: none;">constant::::__ANON__[:42]</span>constant::<a href="constant-pm-32-line.html#42">__ANON__[:42]</a></td></tr>
</tbody></table>
                Call graph for these subroutines as a
                <a href="http://en.wikipedia.org/wiki/Graphviz">Graphviz</a>
                <a href="usr-lib-perl5-5-20-1-constant-pm.dot">dot language file</a>.
            
      <table border="1" cellpadding="0">
      <thead>
      <tr><th>Line</th>
      <th><span title="Number of statements executed">State<br />ments</span></th>
      <th><span title="Time spend executing statements on the line,
        excluding time spent executing statements in any called subroutines">Time<br />on line</span></th>
      <th><span title="Number of subroutines calls">Calls</span></th>
      <th><span title="Time spent in subroutines called (inclusive)">Time<br />in subs</span></th>
      <th class="left_indent_header">Code</th>
      </tr>

      </thead>
      <tbody>
    <tr><td class="h"><a name="1"></a>1</td><td></td><td></td><td></td><td></td><td class="s">package constant;</td></tr>
<tr><td class="h"><a name="2"></a>2</td><td class="c3">2</td><td class="c0"><span title="Avg 11µs">23µs</span></td><td class="c3">1</td><td class="c3">9µs</td><td class="s"><div class="calls"><div class="calls_in"># spent 9µs within constant::BEGIN@2 which was called:
#    once (9µs+0s) by Encode::BEGIN@8 at <a href="constant-pm-32-line.html#2">line 2</a></div></div>use 5.008;<div class="calls"><div class="calls_out"># spent     9µs making 1 call to <a href="constant-pm-32-line.html#2">constant::BEGIN@2</a></div></div></td></tr>
<tr><td class="h"><a name="3"></a>3</td><td class="c3">2</td><td class="c0"><span title="Avg 6µs">12µs</span></td><td class="c3">2</td><td class="c2">16µs</td><td class="s"><div class="calls"><div class="calls_in"># spent 10µs (3+6) within constant::BEGIN@3 which was called:
#    once (3µs+6µs) by Encode::BEGIN@8 at <a href="constant-pm-32-line.html#3">line 3</a></div></div>use strict;<div class="calls"><div class="calls_out"># spent    10µs making 1 call to <a href="constant-pm-32-line.html#3">constant::BEGIN@3</a>
# spent     6µs making 1 call to <a href="strict-pm-3-line.html#42">strict::import</a></div></div></td></tr>
<tr><td class="h"><a name="4"></a>4</td><td class="c3">2</td><td class="c0"><span title="Avg 8µs">15µs</span></td><td class="c3">2</td><td class="c0">110µs</td><td class="s"><div class="calls"><div class="calls_in"># spent 57µs (4+53) within constant::BEGIN@4 which was called:
#    once (4µs+53µs) by Encode::BEGIN@8 at <a href="constant-pm-32-line.html#4">line 4</a></div></div>use warnings::register;<div class="calls"><div class="calls_out"># spent    57µs making 1 call to <a href="constant-pm-32-line.html#4">constant::BEGIN@4</a>
# spent    53µs making 1 call to <a href="warnings-register-pm-9-line.html#37">warnings::register::import</a></div></div></td></tr>
<tr><td class="h"><a name="5"></a>5</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="6"></a>6</td><td class="c3">2</td><td class="c0"><span title="Avg 154µs">307µs</span></td><td class="c3">2</td><td class="c0">41µs</td><td class="s"><div class="calls"><div class="calls_in"># spent 22µs (3+19) within constant::BEGIN@6 which was called:
#    once (3µs+19µs) by Encode::BEGIN@8 at <a href="constant-pm-32-line.html#6">line 6</a></div></div>use vars qw($VERSION %declared);<div class="calls"><div class="calls_out"># spent    22µs making 1 call to <a href="constant-pm-32-line.html#6">constant::BEGIN@6</a>
# spent    19µs making 1 call to <a href="vars-pm-8-line.html#10">vars::import</a></div></div></td></tr>
<tr><td class="h"><a name="7"></a>7</td><td class="c3">1</td><td class="c3"><span title="Avg 300ns">300ns</span></td><td></td><td></td><td class="s">$VERSION = '1.31';</td></tr>
<tr><td class="h"><a name="8"></a>8</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="9"></a>9</td><td></td><td></td><td></td><td></td><td class="s">#=======================================================================</td></tr>
<tr><td class="h"><a name="10"></a>10</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="11"></a>11</td><td></td><td></td><td></td><td></td><td class="s"># Some names are evil choices.</td></tr>
<tr><td class="h"><a name="12"></a>12</td><td class="c3">1</td><td class="c0"><span title="Avg 3µs">3µs</span></td><td></td><td></td><td class="s">my %keywords = map +($_, 1), qw{ BEGIN INIT CHECK END DESTROY AUTOLOAD };</td></tr>
<tr><td class="h"><a name="13"></a>13</td><td class="c3">1</td><td class="c3"><span title="Avg 900ns">900ns</span></td><td></td><td></td><td class="s">$keywords{UNITCHECK}++ if $] &gt; 5.009;</td></tr>
<tr><td class="h"><a name="14"></a>14</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="15"></a>15</td><td class="c3">1</td><td class="c0"><span title="Avg 3µs">3µs</span></td><td></td><td></td><td class="s">my %forced_into_main = map +($_, 1),</td></tr>
<tr><td class="h"><a name="16"></a>16</td><td></td><td></td><td></td><td></td><td class="s">    qw{ STDIN STDOUT STDERR ARGV ARGVOUT ENV INC SIG };</td></tr>
<tr><td class="h"><a name="17"></a>17</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="18"></a>18</td><td class="c3">1</td><td class="c0"><span title="Avg 3µs">3µs</span></td><td></td><td></td><td class="s">my %forbidden = (%keywords, %forced_into_main);</td></tr>
<tr><td class="h"><a name="19"></a>19</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="20"></a>20</td><td class="c3">1</td><td class="c0"><span title="Avg 5µs">5µs</span></td><td class="c3">1</td><td class="c3">2µs</td><td class="s">my $normal_constant_name = qr/^_?[^\W_0-9]\w*\z/;<div class="calls"><div class="calls_out"># spent     2µs making 1 call to <a href="constant-pm-32-line.html#constant__CORE_qr">constant::CORE:qr</a></div></div></td></tr>
<tr><td class="h"><a name="21"></a>21</td><td class="c3">1</td><td class="c3"><span title="Avg 2µs">2µs</span></td><td class="c3">1</td><td class="c3">400ns</td><td class="s">my $tolerable = qr/^[A-Za-z_]\w*\z/;<div class="calls"><div class="calls_out"># spent   400ns making 1 call to <a href="constant-pm-32-line.html#constant__CORE_qr">constant::CORE:qr</a></div></div></td></tr>
<tr><td class="h"><a name="22"></a>22</td><td class="c3">1</td><td class="c3"><span title="Avg 1µs">1µs</span></td><td class="c3">1</td><td class="c3">200ns</td><td class="s">my $boolean = qr/^[01]?\z/;<div class="calls"><div class="calls_out"># spent   200ns making 1 call to <a href="constant-pm-32-line.html#constant__CORE_qr">constant::CORE:qr</a></div></div></td></tr>
<tr><td class="h"><a name="23"></a>23</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="24"></a>24</td><td></td><td></td><td></td><td></td><td class="s"><div class="calls"><div class="calls_in"># spent 11µs (10+700ns) within constant::BEGIN@24 which was called:
#    once (10µs+700ns) by Encode::BEGIN@8 at <a href="constant-pm-32-line.html#44">line 44</a></div></div>BEGIN {</td></tr>
<tr><td class="h"><a name="25"></a>25</td><td></td><td></td><td></td><td></td><td class="s">    # We'd like to do use constant _CAN_PCS =&gt; $] &gt; 5.009002</td></tr>
<tr><td class="h"><a name="26"></a>26</td><td></td><td></td><td></td><td></td><td class="s">    # but that's a bit tricky before we load the constant module :-)</td></tr>
<tr><td class="h"><a name="27"></a>27</td><td></td><td></td><td></td><td></td><td class="s">    # By doing this, we save 1 run time check for *every* call to import.</td></tr>
<tr><td class="h"><a name="28"></a>28</td><td class="c3">1</td><td class="c3"><span title="Avg 600ns">600ns</span></td><td></td><td></td><td class="s">    my $const = $] &gt; 5.009002;</td></tr>
<tr><td class="h"><a name="29"></a>29</td><td class="c3">1</td><td class="c3"><span title="Avg 300ns">300ns</span></td><td></td><td></td><td class="s">    my $downgrade = $] &lt; 5.015004; # &amp;&amp; $] &gt;= 5.008</td></tr>
<tr><td class="h"><a name="30"></a>30</td><td class="c3">1</td><td class="c3"><span title="Avg 300ns">300ns</span></td><td></td><td></td><td class="s">    my $constarray = exists &amp;_make_const;</td></tr>
<tr><td class="h"><a name="31"></a>31</td><td class="c3">1</td><td class="c2"><span title="Avg 2µs">2µs</span></td><td></td><td></td><td class="s">    if ($const) {</td></tr>
<tr><td class="h"><a name="32"></a>32</td><td class="c3">1</td><td class="c0"><span title="Avg 4µs">4µs</span></td><td class="c3">1</td><td class="c3">600ns</td><td class="s">        Internals::SvREADONLY($const, 1);<div class="calls"><div class="calls_out">        # spent   600ns making 1 call to <a href="dm5dm6_ex3-1-line.html#Internals__SvREADONLY">Internals::SvREADONLY</a></div></div></td></tr>
<tr><td class="h"><a name="33"></a>33</td><td class="c3">1</td><td class="c2"><span title="Avg 2µs">2µs</span></td><td class="c3">1</td><td class="c3">100ns</td><td class="s">        Internals::SvREADONLY($downgrade, 1);<div class="calls"><div class="calls_out">        # spent   100ns making 1 call to <a href="dm5dm6_ex3-1-line.html#Internals__SvREADONLY">Internals::SvREADONLY</a></div></div></td></tr>
<tr><td class="h"><a name="34"></a>34</td><td class="c3">1</td><td class="c3"><span title="Avg 900ns">900ns</span></td><td></td><td></td><td class="s">        $constant::{_CAN_PCS}   = \$const;</td></tr>
<tr><td class="h"><a name="35"></a>35</td><td class="c3">1</td><td class="c3"><span title="Avg 200ns">200ns</span></td><td></td><td></td><td class="s">        $constant::{_DOWNGRADE} = \$downgrade;</td></tr>
<tr><td class="h"><a name="36"></a>36</td><td class="c3">1</td><td class="c3"><span title="Avg 400ns">400ns</span></td><td></td><td></td><td class="s">        $constant::{_CAN_PCS_FOR_ARRAY} = \$constarray;</td></tr>
<tr><td class="h"><a name="37"></a>37</td><td></td><td></td><td></td><td></td><td class="s">    }</td></tr>
<tr><td class="h"><a name="38"></a>38</td><td></td><td></td><td></td><td></td><td class="s">    else {</td></tr>
<tr><td class="h"><a name="39"></a>39</td><td class="c3">2</td><td class="c0"><span title="Avg 41µs">83µs</span></td><td class="c3">2</td><td class="c1">20µs</td><td class="s"><div class="calls"><div class="calls_in"># spent 13µs (6+7) within constant::BEGIN@39 which was called:
#    once (6µs+7µs) by Encode::BEGIN@8 at <a href="constant-pm-32-line.html#39">line 39</a></div></div>        no strict 'refs';<div class="calls"><div class="calls_out">        # spent    13µs making 1 call to <a href="constant-pm-32-line.html#39">constant::BEGIN@39</a>
        # spent     7µs making 1 call to <a href="strict-pm-3-line.html#47">strict::unimport</a></div></div></td></tr>
<tr><td class="h"><a name="40"></a>40</td><td></td><td></td><td></td><td></td><td class="s">        *{&quot;_CAN_PCS&quot;}   = sub () {$const};</td></tr>
<tr><td class="h"><a name="41"></a>41</td><td></td><td></td><td></td><td></td><td class="s">        *{&quot;_DOWNGRADE&quot;} = sub () { $downgrade };</td></tr>
<tr><td class="h"><a name="42"></a>42</td><td></td><td></td><td></td><td></td><td class="s">        *{&quot;_CAN_PCS_FOR_ARRAY&quot;} = sub () { $constarray };</td></tr>
<tr><td class="h"><a name="43"></a>43</td><td></td><td></td><td></td><td></td><td class="s">    }</td></tr>
<tr><td class="h"><a name="44"></a>44</td><td class="c3">1</td><td class="c0"><span title="Avg 42µs">42µs</span></td><td class="c3">1</td><td class="c3">11µs</td><td class="s">}<div class="calls"><div class="calls_out"># spent    11µs making 1 call to <a href="constant-pm-32-line.html#24">constant::BEGIN@24</a></div></div></td></tr>
<tr><td class="h"><a name="45"></a>45</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="46"></a>46</td><td></td><td></td><td></td><td></td><td class="s">#=======================================================================</td></tr>
<tr><td class="h"><a name="47"></a>47</td><td></td><td></td><td></td><td></td><td class="s"># import() - import symbols into user's namespace</td></tr>
<tr><td class="h"><a name="48"></a>48</td><td></td><td></td><td></td><td></td><td class="s">#</td></tr>
<tr><td class="h"><a name="49"></a>49</td><td></td><td></td><td></td><td></td><td class="s"># What we actually do is define a function in the caller's namespace</td></tr>
<tr><td class="h"><a name="50"></a>50</td><td></td><td></td><td></td><td></td><td class="s"># which returns the value. The function we create will normally</td></tr>
<tr><td class="h"><a name="51"></a>51</td><td></td><td></td><td></td><td></td><td class="s"># be inlined as a constant, thereby avoiding further sub calling </td></tr>
<tr><td class="h"><a name="52"></a>52</td><td></td><td></td><td></td><td></td><td class="s"># overhead.</td></tr>
<tr><td class="h"><a name="53"></a>53</td><td></td><td></td><td></td><td></td><td class="s">#=======================================================================</td></tr>
<tr><td class="h"><a name="54"></a>54</td><td></td><td></td><td></td><td></td><td class="s"><div class="calls"><div class="calls_in"># spent 42µs (31+11) within constant::import which was called 2 times, avg 21µs/call:
#    once (18µs+7µs) by Encode::BEGIN@8 at <a href="Encode-pm-31-line.html#8">line 8 of Encode.pm</a>
#    once (13µs+4µs) by Encode::Alias::BEGIN@6 at <a href="Encode-Alias-pm-33-line.html#6">line 6 of Encode/Alias.pm</a></div></div>sub import {</td></tr>
<tr><td class="h"><a name="55"></a>55</td><td class="c3">2</td><td class="c3"><span title="Avg 200ns">400ns</span></td><td></td><td></td><td class="s">    my $class = shift;</td></tr>
<tr><td class="h"><a name="56"></a>56</td><td class="c3">2</td><td class="c3"><span title="Avg 200ns">400ns</span></td><td></td><td></td><td class="s">    return unless @_;                        # Ignore 'use constant;'</td></tr>
<tr><td class="h"><a name="57"></a>57</td><td class="c3">2</td><td class="c3"><span title="Avg 100ns">200ns</span></td><td></td><td></td><td class="s">    my $constants;</td></tr>
<tr><td class="h"><a name="58"></a>58</td><td class="c3">2</td><td class="c3"><span title="Avg 350ns">700ns</span></td><td></td><td></td><td class="s">    my $multiple  = ref $_[0];</td></tr>
<tr><td class="h"><a name="59"></a>59</td><td class="c3">2</td><td class="c3"><span title="Avg 400ns">800ns</span></td><td></td><td></td><td class="s">    my $pkg = caller;</td></tr>
<tr><td class="h"><a name="60"></a>60</td><td class="c3">2</td><td class="c3"><span title="Avg 100ns">200ns</span></td><td></td><td></td><td class="s">    my $flush_mro;</td></tr>
<tr><td class="h"><a name="61"></a>61</td><td></td><td></td><td></td><td></td><td class="s">    my $symtab;</td></tr>
<tr><td class="h"><a name="62"></a>62</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="63"></a>63</td><td class="c3">2</td><td class="c3"><span title="Avg 200ns">400ns</span></td><td></td><td></td><td class="s">    if (_CAN_PCS) {</td></tr>
<tr><td class="h"><a name="64"></a>64</td><td class="c3">2</td><td class="c0"><span title="Avg 69µs">138µs</span></td><td class="c3">2</td><td class="c2">15µs</td><td class="s"><div class="calls"><div class="calls_in"># spent 9µs (3+6) within constant::BEGIN@64 which was called:
#    once (3µs+6µs) by Encode::BEGIN@8 at <a href="constant-pm-32-line.html#64">line 64</a></div></div>        no strict 'refs';<div class="calls"><div class="calls_out">        # spent     9µs making 1 call to <a href="constant-pm-32-line.html#64">constant::BEGIN@64</a>
        # spent     6µs making 1 call to <a href="strict-pm-3-line.html#47">strict::unimport</a></div></div></td></tr>
<tr><td class="h"><a name="65"></a>65</td><td class="c3">2</td><td class="c3"><span title="Avg 750ns">2µs</span></td><td></td><td></td><td class="s">        $symtab = \%{$pkg . '::'};</td></tr>
<tr><td class="h"><a name="66"></a>66</td><td></td><td></td><td></td><td></td><td class="s">    };</td></tr>
<tr><td class="h"><a name="67"></a>67</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="68"></a>68</td><td class="c3">2</td><td class="c3"><span title="Avg 200ns">400ns</span></td><td></td><td></td><td class="s">    if ( $multiple ) {</td></tr>
<tr><td class="h"><a name="69"></a>69</td><td></td><td></td><td></td><td></td><td class="s">        if (ref $_[0] ne 'HASH') {</td></tr>
<tr><td class="h"><a name="70"></a>70</td><td></td><td></td><td></td><td></td><td class="s">            require Carp;</td></tr>
<tr><td class="h"><a name="71"></a>71</td><td></td><td></td><td></td><td></td><td class="s">            Carp::croak(&quot;Invalid reference type '&quot;.ref(shift).&quot;' not 'HASH'&quot;);</td></tr>
<tr><td class="h"><a name="72"></a>72</td><td></td><td></td><td></td><td></td><td class="s">        }</td></tr>
<tr><td class="h"><a name="73"></a>73</td><td></td><td></td><td></td><td></td><td class="s">        $constants = shift;</td></tr>
<tr><td class="h"><a name="74"></a>74</td><td></td><td></td><td></td><td></td><td class="s">    } else {</td></tr>
<tr><td class="h"><a name="75"></a>75</td><td class="c3">2</td><td class="c3"><span title="Avg 150ns">300ns</span></td><td></td><td></td><td class="s">        unless (defined $_[0]) {</td></tr>
<tr><td class="h"><a name="76"></a>76</td><td></td><td></td><td></td><td></td><td class="s">            require Carp;</td></tr>
<tr><td class="h"><a name="77"></a>77</td><td></td><td></td><td></td><td></td><td class="s">            Carp::croak(&quot;Can't use undef as constant name&quot;);</td></tr>
<tr><td class="h"><a name="78"></a>78</td><td></td><td></td><td></td><td></td><td class="s">        }</td></tr>
<tr><td class="h"><a name="79"></a>79</td><td class="c3">2</td><td class="c3"><span title="Avg 600ns">1µs</span></td><td></td><td></td><td class="s">        $constants-&gt;{+shift} = undef;</td></tr>
<tr><td class="h"><a name="80"></a>80</td><td></td><td></td><td></td><td></td><td class="s">    }</td></tr>
<tr><td class="h"><a name="81"></a>81</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="82"></a>82</td><td class="c3">2</td><td class="c2"><span title="Avg 950ns">2µs</span></td><td></td><td></td><td class="s">    foreach my $name ( keys %$constants ) {</td></tr>
<tr><td class="h"><a name="83"></a>83</td><td></td><td></td><td></td><td></td><td class="s">        # Normal constant name</td></tr>
<tr><td class="h"><a name="84"></a>84</td><td class="c3">2</td><td class="c0"><span title="Avg 8µs">16µs</span></td><td class="c0">4</td><td class="c3">9µs</td><td class="s">        if ($name =~ $normal_constant_name and !$forbidden{$name}) {<div class="calls"><div class="calls_out">        # spent     5µs making 2 calls to <a href="constant-pm-32-line.html#constant__CORE_regcomp">constant::CORE:regcomp</a>, avg 2µs/call
        # spent     4µs making 2 calls to <a href="constant-pm-32-line.html#constant__CORE_match">constant::CORE:match</a>, avg 2µs/call</div></div></td></tr>
<tr><td class="h"><a name="85"></a>85</td><td></td><td></td><td></td><td></td><td class="s">            # Everything is okay</td></tr>
<tr><td class="h"><a name="86"></a>86</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="87"></a>87</td><td></td><td></td><td></td><td></td><td class="s">        # Name forced into main, but we're not in main. Fatal.</td></tr>
<tr><td class="h"><a name="88"></a>88</td><td></td><td></td><td></td><td></td><td class="s">        } elsif ($forced_into_main{$name} and $pkg ne 'main') {</td></tr>
<tr><td class="h"><a name="89"></a>89</td><td></td><td></td><td></td><td></td><td class="s">            require Carp;</td></tr>
<tr><td class="h"><a name="90"></a>90</td><td></td><td></td><td></td><td></td><td class="s">            Carp::croak(&quot;Constant name '$name' is forced into main::&quot;);</td></tr>
<tr><td class="h"><a name="91"></a>91</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="92"></a>92</td><td></td><td></td><td></td><td></td><td class="s">        # Starts with double underscore. Fatal.</td></tr>
<tr><td class="h"><a name="93"></a>93</td><td></td><td></td><td></td><td></td><td class="s">        } elsif ($name =~ /^__/) {</td></tr>
<tr><td class="h"><a name="94"></a>94</td><td></td><td></td><td></td><td></td><td class="s">            require Carp;</td></tr>
<tr><td class="h"><a name="95"></a>95</td><td></td><td></td><td></td><td></td><td class="s">            Carp::croak(&quot;Constant name '$name' begins with '__'&quot;);</td></tr>
<tr><td class="h"><a name="96"></a>96</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="97"></a>97</td><td></td><td></td><td></td><td></td><td class="s">        # Maybe the name is tolerable</td></tr>
<tr><td class="h"><a name="98"></a>98</td><td></td><td></td><td></td><td></td><td class="s">        } elsif ($name =~ $tolerable) {</td></tr>
<tr><td class="h"><a name="99"></a>99</td><td></td><td></td><td></td><td></td><td class="s">            # Then we'll warn only if you've asked for warnings</td></tr>
<tr><td class="h"><a name="100"></a>100</td><td></td><td></td><td></td><td></td><td class="s">            if (warnings::enabled()) {</td></tr>
<tr><td class="h"><a name="101"></a>101</td><td></td><td></td><td></td><td></td><td class="s">                if ($keywords{$name}) {</td></tr>
<tr><td class="h"><a name="102"></a>102</td><td></td><td></td><td></td><td></td><td class="s">                    warnings::warn(&quot;Constant name '$name' is a Perl keyword&quot;);</td></tr>
<tr><td class="h"><a name="103"></a>103</td><td></td><td></td><td></td><td></td><td class="s">                } elsif ($forced_into_main{$name}) {</td></tr>
<tr><td class="h"><a name="104"></a>104</td><td></td><td></td><td></td><td></td><td class="s">                    warnings::warn(&quot;Constant name '$name' is &quot; .</td></tr>
<tr><td class="h"><a name="105"></a>105</td><td></td><td></td><td></td><td></td><td class="s">                        &quot;forced into package main::&quot;);</td></tr>
<tr><td class="h"><a name="106"></a>106</td><td></td><td></td><td></td><td></td><td class="s">                }</td></tr>
<tr><td class="h"><a name="107"></a>107</td><td></td><td></td><td></td><td></td><td class="s">            }</td></tr>
<tr><td class="h"><a name="108"></a>108</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="109"></a>109</td><td></td><td></td><td></td><td></td><td class="s">        # Looks like a boolean</td></tr>
<tr><td class="h"><a name="110"></a>110</td><td></td><td></td><td></td><td></td><td class="s">        # use constant FRED == fred;</td></tr>
<tr><td class="h"><a name="111"></a>111</td><td></td><td></td><td></td><td></td><td class="s">        } elsif ($name =~ $boolean) {</td></tr>
<tr><td class="h"><a name="112"></a>112</td><td></td><td></td><td></td><td></td><td class="s">            require Carp;</td></tr>
<tr><td class="h"><a name="113"></a>113</td><td></td><td></td><td></td><td></td><td class="s">            if (@_) {</td></tr>
<tr><td class="h"><a name="114"></a>114</td><td></td><td></td><td></td><td></td><td class="s">                Carp::croak(&quot;Constant name '$name' is invalid&quot;);</td></tr>
<tr><td class="h"><a name="115"></a>115</td><td></td><td></td><td></td><td></td><td class="s">            } else {</td></tr>
<tr><td class="h"><a name="116"></a>116</td><td></td><td></td><td></td><td></td><td class="s">                Carp::croak(&quot;Constant name looks like boolean value&quot;);</td></tr>
<tr><td class="h"><a name="117"></a>117</td><td></td><td></td><td></td><td></td><td class="s">            }</td></tr>
<tr><td class="h"><a name="118"></a>118</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="119"></a>119</td><td></td><td></td><td></td><td></td><td class="s">        } else {</td></tr>
<tr><td class="h"><a name="120"></a>120</td><td></td><td></td><td></td><td></td><td class="s">           # Must have bad characters</td></tr>
<tr><td class="h"><a name="121"></a>121</td><td></td><td></td><td></td><td></td><td class="s">            require Carp;</td></tr>
<tr><td class="h"><a name="122"></a>122</td><td></td><td></td><td></td><td></td><td class="s">            Carp::croak(&quot;Constant name '$name' has invalid characters&quot;);</td></tr>
<tr><td class="h"><a name="123"></a>123</td><td></td><td></td><td></td><td></td><td class="s">        }</td></tr>
<tr><td class="h"><a name="124"></a>124</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="125"></a>125</td><td></td><td></td><td></td><td></td><td class="s">        {</td></tr>
<tr><td class="h"><a name="126"></a>126</td><td class="c0">4</td><td class="c0"><span title="Avg 50µs">198µs</span></td><td class="c3">2</td><td class="c2">16µs</td><td class="s"><div class="calls"><div class="calls_in"># spent 10µs (4+6) within constant::BEGIN@126 which was called:
#    once (4µs+6µs) by Encode::BEGIN@8 at <a href="constant-pm-32-line.html#126">line 126</a></div></div>            no strict 'refs';<div class="calls"><div class="calls_out">            # spent    10µs making 1 call to <a href="constant-pm-32-line.html#126">constant::BEGIN@126</a>
            # spent     6µs making 1 call to <a href="strict-pm-3-line.html#47">strict::unimport</a></div></div></td></tr>
<tr><td class="h"><a name="127"></a>127</td><td class="c3">2</td><td class="c3"><span title="Avg 450ns">900ns</span></td><td></td><td></td><td class="s">            my $full_name = &quot;${pkg}::$name&quot;;</td></tr>
<tr><td class="h"><a name="128"></a>128</td><td class="c3">2</td><td class="c3"><span title="Avg 450ns">900ns</span></td><td></td><td></td><td class="s">            $declared{$full_name}++;</td></tr>
<tr><td class="h"><a name="129"></a>129</td><td class="c3">2</td><td class="c3"><span title="Avg 350ns">700ns</span></td><td></td><td></td><td class="s">            if ($multiple || @_ == 1) {</td></tr>
<tr><td class="h"><a name="130"></a>130</td><td class="c3">2</td><td class="c3"><span title="Avg 250ns">500ns</span></td><td></td><td></td><td class="s">                my $scalar = $multiple ? $constants-&gt;{$name} : $_[0];</td></tr>
<tr><td class="h"><a name="131"></a>131</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="132"></a>132</td><td></td><td></td><td></td><td></td><td class="s">                if (_DOWNGRADE) { # for 5.8 to 5.14</td></tr>
<tr><td class="h"><a name="133"></a>133</td><td></td><td></td><td></td><td></td><td class="s">                    # Work around perl bug #31991: Sub names (actually glob</td></tr>
<tr><td class="h"><a name="134"></a>134</td><td></td><td></td><td></td><td></td><td class="s">                    # names in general) ignore the UTF8 flag. So we have to</td></tr>
<tr><td class="h"><a name="135"></a>135</td><td></td><td></td><td></td><td></td><td class="s">                    # turn it off to get the &quot;right&quot; symbol table entry.</td></tr>
<tr><td class="h"><a name="136"></a>136</td><td></td><td></td><td></td><td></td><td class="s">                    utf8::is_utf8 $name and utf8::encode $name;</td></tr>
<tr><td class="h"><a name="137"></a>137</td><td></td><td></td><td></td><td></td><td class="s">                }</td></tr>
<tr><td class="h"><a name="138"></a>138</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="139"></a>139</td><td></td><td></td><td></td><td></td><td class="s">                # The constant serves to optimise this entire block out on</td></tr>
<tr><td class="h"><a name="140"></a>140</td><td></td><td></td><td></td><td></td><td class="s">                # 5.8 and earlier.</td></tr>
<tr><td class="h"><a name="141"></a>141</td><td class="c3">2</td><td class="c3"><span title="Avg 250ns">500ns</span></td><td></td><td></td><td class="s">                if (_CAN_PCS) {</td></tr>
<tr><td class="h"><a name="142"></a>142</td><td></td><td></td><td></td><td></td><td class="s">                    # Use a reference as a proxy for a constant subroutine.</td></tr>
<tr><td class="h"><a name="143"></a>143</td><td></td><td></td><td></td><td></td><td class="s">                    # If this is not a glob yet, it saves space.  If it is</td></tr>
<tr><td class="h"><a name="144"></a>144</td><td></td><td></td><td></td><td></td><td class="s">                    # a glob, we must still create it this way to get the</td></tr>
<tr><td class="h"><a name="145"></a>145</td><td></td><td></td><td></td><td></td><td class="s">                    # right internal flags set, as constants are distinct</td></tr>
<tr><td class="h"><a name="146"></a>146</td><td></td><td></td><td></td><td></td><td class="s">                    # from subroutines created with sub(){...}.</td></tr>
<tr><td class="h"><a name="147"></a>147</td><td></td><td></td><td></td><td></td><td class="s">                    # The check in Perl_ck_rvconst knows that inlinable</td></tr>
<tr><td class="h"><a name="148"></a>148</td><td></td><td></td><td></td><td></td><td class="s">                    # constants from cv_const_sv are read only. So we have to:</td></tr>
<tr><td class="h"><a name="149"></a>149</td><td class="c3">2</td><td class="c0"><span title="Avg 2µs">3µs</span></td><td class="c3">2</td><td class="c3">900ns</td><td class="s">                    Internals::SvREADONLY($scalar, 1);<div class="calls"><div class="calls_out">                    # spent   900ns making 2 calls to <a href="dm5dm6_ex3-1-line.html#Internals__SvREADONLY">Internals::SvREADONLY</a>, avg 450ns/call</div></div></td></tr>
<tr><td class="h"><a name="150"></a>150</td><td class="c3">2</td><td class="c3"><span title="Avg 550ns">1µs</span></td><td></td><td></td><td class="s">                    if ($symtab &amp;&amp; !exists $symtab-&gt;{$name}) {</td></tr>
<tr><td class="h"><a name="151"></a>151</td><td class="c3">2</td><td class="c3"><span title="Avg 350ns">700ns</span></td><td></td><td></td><td class="s">                        $symtab-&gt;{$name} = \$scalar;</td></tr>
<tr><td class="h"><a name="152"></a>152</td><td class="c3">2</td><td class="c3"><span title="Avg 100ns">200ns</span></td><td></td><td></td><td class="s">                        ++$flush_mro;</td></tr>
<tr><td class="h"><a name="153"></a>153</td><td></td><td></td><td></td><td></td><td class="s">                    }</td></tr>
<tr><td class="h"><a name="154"></a>154</td><td></td><td></td><td></td><td></td><td class="s">                    else {</td></tr>
<tr><td class="h"><a name="155"></a>155</td><td></td><td></td><td></td><td></td><td class="s">                        local $constant::{_dummy} = \$scalar;</td></tr>
<tr><td class="h"><a name="156"></a>156</td><td></td><td></td><td></td><td></td><td class="s">                        *$full_name = \&amp;{&quot;_dummy&quot;};</td></tr>
<tr><td class="h"><a name="157"></a>157</td><td></td><td></td><td></td><td></td><td class="s">                    }</td></tr>
<tr><td class="h"><a name="158"></a>158</td><td></td><td></td><td></td><td></td><td class="s">                } else {</td></tr>
<tr><td class="h"><a name="159"></a>159</td><td></td><td></td><td></td><td></td><td class="s">                    *$full_name = sub () { $scalar };</td></tr>
<tr><td class="h"><a name="160"></a>160</td><td></td><td></td><td></td><td></td><td class="s">                }</td></tr>
<tr><td class="h"><a name="161"></a>161</td><td></td><td></td><td></td><td></td><td class="s">            } elsif (@_) {</td></tr>
<tr><td class="h"><a name="162"></a>162</td><td></td><td></td><td></td><td></td><td class="s">                my @list = @_;</td></tr>
<tr><td class="h"><a name="163"></a>163</td><td></td><td></td><td></td><td></td><td class="s">                if (_CAN_PCS_FOR_ARRAY) {</td></tr>
<tr><td class="h"><a name="164"></a>164</td><td></td><td></td><td></td><td></td><td class="s">                    _make_const($list[$_]) for 0..$#list;</td></tr>
<tr><td class="h"><a name="165"></a>165</td><td></td><td></td><td></td><td></td><td class="s">                    _make_const(@list);</td></tr>
<tr><td class="h"><a name="166"></a>166</td><td></td><td></td><td></td><td></td><td class="s">                    if ($symtab &amp;&amp; !exists $symtab-&gt;{$name}) {</td></tr>
<tr><td class="h"><a name="167"></a>167</td><td></td><td></td><td></td><td></td><td class="s">                        $symtab-&gt;{$name} = \@list;</td></tr>
<tr><td class="h"><a name="168"></a>168</td><td></td><td></td><td></td><td></td><td class="s">                        $flush_mro++;</td></tr>
<tr><td class="h"><a name="169"></a>169</td><td></td><td></td><td></td><td></td><td class="s">                    }</td></tr>
<tr><td class="h"><a name="170"></a>170</td><td></td><td></td><td></td><td></td><td class="s">                    else {</td></tr>
<tr><td class="h"><a name="171"></a>171</td><td></td><td></td><td></td><td></td><td class="s">                        local $constant::{_dummy} = \@list;</td></tr>
<tr><td class="h"><a name="172"></a>172</td><td></td><td></td><td></td><td></td><td class="s">                        *$full_name = \&amp;{&quot;_dummy&quot;};</td></tr>
<tr><td class="h"><a name="173"></a>173</td><td></td><td></td><td></td><td></td><td class="s">                    }</td></tr>
<tr><td class="h"><a name="174"></a>174</td><td></td><td></td><td></td><td></td><td class="s">                }</td></tr>
<tr><td class="h"><a name="175"></a>175</td><td></td><td></td><td></td><td></td><td class="s">                else { *$full_name = sub () { @list }; }</td></tr>
<tr><td class="h"><a name="176"></a>176</td><td></td><td></td><td></td><td></td><td class="s">            } else {</td></tr>
<tr><td class="h"><a name="177"></a>177</td><td></td><td></td><td></td><td></td><td class="s">                *$full_name = sub () { };</td></tr>
<tr><td class="h"><a name="178"></a>178</td><td></td><td></td><td></td><td></td><td class="s">            }</td></tr>
<tr><td class="h"><a name="179"></a>179</td><td></td><td></td><td></td><td></td><td class="s">        }</td></tr>
<tr><td class="h"><a name="180"></a>180</td><td></td><td></td><td></td><td></td><td class="s">    }</td></tr>
<tr><td class="h"><a name="181"></a>181</td><td></td><td></td><td></td><td></td><td class="s">    # Flush the cache exactly once if we make any direct symbol table changes.</td></tr>
<tr><td class="h"><a name="182"></a>182</td><td class="c3">2</td><td class="c0"><span title="Avg 5µs">9µs</span></td><td class="c3">2</td><td class="c3">1µs</td><td class="s">    mro::method_changed_in($pkg) if _CAN_PCS &amp;&amp; $flush_mro;<div class="calls"><div class="calls_out">    # spent     1µs making 2 calls to <a href="dm5dm6_ex3-1-line.html#mro__method_changed_in">mro::method_changed_in</a>, avg 550ns/call</div></div></td></tr>
<tr><td class="h"><a name="183"></a>183</td><td></td><td></td><td></td><td></td><td class="s">}</td></tr>
<tr><td class="h"><a name="184"></a>184</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="185"></a>185</td><td class="c3">1</td><td class="c0"><span title="Avg 4µs">4µs</span></td><td></td><td></td><td class="s">1;</td></tr>
<tr><td class="h"><a name="186"></a>186</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="187"></a>187</td><td></td><td></td><td></td><td></td><td class="s">__END__</td></tr>
<tr><td class="s"><a name=""></a>&nbsp;</td><td></td><td></td><td></td><td></td><td class="s"></td></tr>
<tr><td class="h"><a name="constant__CORE_match"></a></td><td></td><td></td><td></td><td></td><td class="s"><div class="calls"><div class="calls_in"># spent 4µs within constant::CORE:match which was called 2 times, avg 2µs/call:
# 2 times (4µs+0s) by constant::import at <a href="constant-pm-32-line.html#84">line 84</a>, avg 2µs/call</div></div>sub constant::CORE:match; # opcode<br />        </td></tr>
<tr><td class="h"><a name="constant__CORE_qr"></a></td><td></td><td></td><td></td><td></td><td class="s"><div class="calls"><div class="calls_in"># spent 2µs within constant::CORE:qr which was called 3 times, avg 700ns/call:
#    once (2µs+0s) by Encode::BEGIN@8 at <a href="constant-pm-32-line.html#20">line 20</a>
#    once (400ns+0s) by Encode::BEGIN@8 at <a href="constant-pm-32-line.html#21">line 21</a>
#    once (200ns+0s) by Encode::BEGIN@8 at <a href="constant-pm-32-line.html#22">line 22</a></div></div>sub constant::CORE:qr; # opcode<br />        </td></tr>
<tr><td class="h"><a name="constant__CORE_regcomp"></a></td><td></td><td></td><td></td><td></td><td class="s"><div class="calls"><div class="calls_in"># spent 5µs within constant::CORE:regcomp which was called 2 times, avg 2µs/call:
# 2 times (5µs+0s) by constant::import at <a href="constant-pm-32-line.html#84">line 84</a>, avg 2µs/call</div></div>sub constant::CORE:regcomp; # opcode<br />        </td></tr>
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