# vim: set sw=2 sts=2 ts=2 expandtab smarttab:
#
# This file is part of Timer-Simple
#
# This software is copyright (c) 2011 by Randy Stauner.
#
# This is free software; you can redistribute it and/or modify it under
# the same terms as the Perl 5 programming language system itself.
#
use strict;
use warnings;
package Timer::Simple;
# git description: v1.005-3-gd10352e
our $AUTHORITY = 'cpan:RWSTAUNER';
# ABSTRACT: Small, simple timer (stopwatch) object
$Timer::Simple::VERSION = '1.006';
use Carp qw(croak carp); # core
use overload # core
'""' => \&string,
'0+' => \&elapsed,
fallback => 1;
sub new {
my $class = shift;
my $self = {
start => 1,
string => 'short',
hires => HIRES(),
@_ == 1 ? %{$_[0]} : @_,
};
if( $self->{format} ){
carp("$class option 'format' is deprecated. Use 'hms' (or 'string')");
$self->{hms} ||= delete $self->{format};
}
$self->{hms} ||= default_format_spec($self->{hires});
bless $self, $class;
$self->start
if $self->{start};
return $self;
}
sub elapsed {
my ($self) = @_;
if( !defined($self->{started}) ){
croak("Timer never started!");
}
# if stop() was called, use that time, otherwise "now"
my $elapsed = defined($self->{stopped})
? $self->{stopped}
: $self->time;
return $self->{hires}
? Time::HiRes::tv_interval($self->{started}, $elapsed)
: $elapsed - $self->{started};
}
sub hms {
my ($self, $format) = @_;
my ($h, $m, $s) = separate_hms($self->elapsed);
return wantarray
? ($h, $m, $s)
: sprintf(($format || $self->{hms}), $h, $m, $s);
}
sub start {
my ($self) = @_;
# don't use an old stopped time if we're restarting
delete $self->{stopped};
$self->{started} = $self->time;
}
sub stop {
my ($self) = @_;
$self->{stopped} = $self->time
# don't change the clock if it's already stopped
if !defined($self->{stopped});
# natural return value would be elapsed() but don't compute it in void context
return $self->elapsed
if defined wantarray;
}
sub string {
my ($self, $format) = @_;
$format ||= $self->{string};
# if it's a method name or a coderef delegate to it
return scalar $self->$format()
if $self->can($format)
|| ref($format) eq 'CODE'
|| overload::Method($format, '&{}');
# cache the time so that all formats show the same (in case it isn't stopped)
my $seconds = $self->elapsed;
my $string;
if( $format eq 'short' ){
$string = sprintf('%ss (' . $self->{hms} . ')', $seconds, separate_hms($seconds));
}
elsif( $format eq 'rps' ){
my $elapsed = sprintf '%f', $seconds;
my $rps = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
$string = "${elapsed}s ($rps/s)";
}
elsif( $format =~ /human|full/ ){
# human
$string = sprintf('%d hours %d minutes %s seconds', separate_hms($seconds));
$string = $seconds . ' seconds (' . $string . ')'
if $format eq 'full';
}
else {
croak("Unknown format: $format");
}
return $string;
}
sub time {
return $_[0]->{hires}
? [ Time::HiRes::gettimeofday() ]
: time;
}
{
# aliases
no warnings 'once';
*restart = \&start;
}
# package functions
{
# only perform the check once, but don't perform the check until required
my $HIRES;
sub HIRES () { ## no critic Prototypes
$HIRES = (do { local $@; eval { require Time::HiRes; 1; } } || '')
if !defined($HIRES);
return $HIRES;
}
}
sub default_format_spec {
my ($fractional) = @_ ? @_ : HIRES();
# float: 9 (width) - 6 (precision) - 1 (dot) == 2 digits before decimal point
return '%02d:%02d:' . ($fractional ? '%09.6f' : '%02d');
}
sub format_hms {
# if only one argument was provided assume its seconds and split it
my ($h, $m, $s) = (@_ == 1 ? separate_hms(@_) : @_);
return sprintf(default_format_spec(int($s) != $s), $h, $m, $s);
}
sub separate_hms {
my ($s) = @_;
# find the number of whole hours, then subtract them
my $h = int($s / 3600);
$s -= $h * 3600;
# find the number of whole minutes, then subtract them
my $m = int($s / 60);
$s -= $m * 60;
return ($h, $m, $s);
}
1;
__END__
=pod
=encoding UTF-8
=for :stopwords Randy Stauner ACKNOWLEDGEMENTS (@pc-office) Hosaka Tomohiro perlancar hms
cpan testmatrix url annocpan anno bugtracker rt cpants kwalitee diff irc
mailto metadata placeholders metacpan
=head1 NAME
Timer::Simple - Small, simple timer (stopwatch) object
=head1 VERSION
version 1.006
=head1 SYNOPSIS
use Timer::Simple ();
my $t = Timer::Simple->new();
do_something;
print "something took: $t\n";
# or take more control
my $timer = Timer::Simple->new(start => 0, string => 'human');
do_something_before;
$timer->start;
do_something_else;
print "time so far: ", $t->elapsed, " seconds\n";
do_a_little_more;
print "time so far: ", $t->elapsed, " seconds\n";
do_still_more;
$timer->stop;
do_something_after;
printf "whole process lasted %d hours %d minutes %f seconds\n", $t->hms;
# or simply "whole process lasted $t\n" with 'string' => 'human'
$timer->restart; # use the same object to time something else
# you can use package functions to work with mutliple timers
$timer1 = Timer::Simple->new;
do_stuff;
$timer1->stop;
do_more;
$timer2 = Timer::Simple->new;
do_more_stuff;
$timer2->stop;
print "first process took $timer1, second process took: $timer2\n";
print "in total took: " . Timer::Simple::format_hms($timer1 + $timer2);
=head1 DESCRIPTION
This is a simple object to make timing an operation as easy as possible.
It uses L<Time::HiRes> if available (unless you tell it not to).
It stringifies to the elapsed time (see L</string>).
This module aims to be small and efficient
and do what is useful in most cases
while also being sufficiently customizable.
=head1 METHODS
=head2 new
Constructor; Takes a hash or hashref of arguments:
=over 4
=item *
C<hires> - Boolean; Defaults to true;
Set this to false to not attempt to use L<Time::HiRes>
and just use L<time|perlfunc/time> instead.
=item *
C<hms> - Alternate C<sprintf> string used by L</hms>
=item *
C<start> - Boolean; Defaults to true;
Set this to false to skip the initial setting of the clock.
You must call L</start> explicitly if you disable this.
=item *
C<string> - The default format for L</string>. Defaults to C<'short'>;
=back
=head2 elapsed
Returns the number of seconds elapsed since the clock was started.
This method is used as the object's value when used in numeric context:
$total_elapsed = $timer1 + $timer2;
=head2 hms
# list
my @units = $timer->hms;
sprintf("%d hours %minutes %f seconds", $timer->hms);
# scalar
print "took: " . $timer->hms . "\n"; # same as print "took :$timer\n";
# alternate format
$string = $timer->hms('%04d h %04d m %020.10f s');
Separates the elapsed time (seconds) into B<h>ours, B<m>inutes, and B<s>econds.
In list context returns a three-element list (hours, minutes, seconds).
In scalar context returns a string resulting from
C<sprintf>
(essentially C<sprintf($format, $h, $m, $s)>).
The default format is
C<00:00:00.000000> (C<%02d:%02d:%9.6f>) with L<Time::HiRes> or
C<00:00:00> (C<%02d:%02d:%02d>) without.
An alternate C<format> can be specified in L</new>
or can be passed as an argument to the method.
=head2 start
X<restart>
Initializes the timer to the current system time.
Aliased as C<restart>.
=head2 stop
Stop the timer.
This records the current system time in case you'd like to do more
processing (that you don't want timed) before reporting the elapsed time.
=head2 string
print $timer->string($format);
print "took: $timer"; # stringification equivalent to $timer->string()
Returns a string representation of the elapsed time.
The format can be passed as an argument. If no format is provided
the value of C<string> (passed to L</new>) will be used.
The format can be the name of another method (which will be called),
a subroutine (coderef) which will be called like an object method,
or one of the following strings:
=over 4
=item *
C<short> - Total elapsed seconds followed by C<hms>: C<'123s (00:02:03)'>
=item *
C<rps> - Total elapsed seconds followed by requests per second: C<'4.743616s (0.211/s)'>
=item *
C<human> - Separate units spelled out: C<'6 hours 4 minutes 12 seconds'>
=item *
C<full> - Total elapsed seconds plus C<human>: C<'2 seconds (0 hours 0 minutes 2 seconds)'>
=back
This is the method called when the object is stringified (using L<overload>).
=head2 time
Returns the current system time
using L<Time::HiRes/gettimeofday> or L<time|perlfunc/time>.
=head1 FUNCTIONS
The following functions should not be necessary in most circumstances
but are provided for convenience to facilitate additional functionality.
They are not available for export (to avoid L<Exporter> overhead).
See L<Sub::Import> if you really want to import these methods.
=head2 HIRES
Indicates whether L<Time::HiRes> is available.
=head2 default_format_spec
$spec = default_format_spec(); # consults HIRES()
$spec_whole = default_format_spec(0); # false forces integer
$spec_fractional = default_format_spec(1); # true forces fraction
Returns an appropriate C<sprintf> format spec according to the provided boolean.
If true, the spec forces fractional seconds (like C<'00:00:00.000000'>).
If false, the spec forces seconds to an integer (like C<'00:00:00'>).
If not specified the value of L</HIRES> will be used.
=head2 format_hms
my $string = format_hms($hours, $minutes, $seconds);
my $string = format_hms($seconds);
Format the provided hours, minutes, and seconds
into a string by guessing the best format.
If only seconds are provided
the value will be passed through L</separate_hms> first.
=head2 separate_hms
my ($hours, $minutes, $seconds) = separate_hms($seconds);
Separate seconds into hours, minutes, and seconds.
Returns a list.
=for test_synopsis my ( $timer1, $timer2 );
no strict 'subs';
=head1 SEE ALSO
These are some other timers I found on CPAN
and how they differ from this module:
=over 4
=item *
L<Time::Elapse> - eccentric API to a tied scalar
=item *
L<Time::Progress> - Doesn't support L<Time::HiRes>
=item *
L<Time::Stopwatch> - tied scalar
=item *
L<Dancer::Timer> - inside Dancer framework
=back
=head1 SUPPORT
=head2 Perldoc
You can find documentation for this module with the perldoc command.
perldoc Timer::Simple
=head2 Websites
The following websites have more information about this module, and may be of help to you. As always,
in addition to those websites please use your favorite search engine to discover more resources.
=over 4
=item *
MetaCPAN
A modern, open-source CPAN search engine, useful to view POD in HTML format.
L<http://metacpan.org/release/Timer-Simple>
=back
=head2 Bugs / Feature Requests
Please report any bugs or feature requests by email to C<bug-timer-simple at rt.cpan.org>, or through
the web interface at L<https://rt.cpan.org/Public/Bug/Report.html?Queue=Timer-Simple>. You will be automatically notified of any
progress on the request by the system.
=head2 Source Code
L<https://github.com/rwstauner/Timer-Simple>
git clone https://github.com/rwstauner/Timer-Simple.git
=head1 AUTHOR
Randy Stauner <rwstauner@cpan.org>
=head1 CONTRIBUTORS
=for stopwords Tomohiro Hosaka perlancar (@pc-office)
=over 4
=item *
Tomohiro Hosaka <bokutin@bokut.in>
=item *
perlancar (@pc-office) <perlancar@gmail.com>
=back
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2011 by Randy Stauner.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut