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0Ilah8]1h Ͳ_ub &=LV[(?Ipackage Benchmark; use strict; =head1 NAME Benchmark - benchmark running times of Perl code =head1 SYNOPSIS use Benchmark qw(:all) ; timethis ($count, "code"); # Use Perl code in strings... timethese($count, { 'Name1' => '...code1...', 'Name2' => '...code2...', }); # ... or use subroutine references. timethese($count, { 'Name1' => sub { ...code1... }, 'Name2' => sub { ...code2... }, }); # cmpthese can be used both ways as well cmpthese($count, { 'Name1' => '...code1...', 'Name2' => '...code2...', }); cmpthese($count, { 'Name1' => sub { ...code1... }, 'Name2' => sub { ...code2... }, }); # ...or in two stages $results = timethese($count, { 'Name1' => sub { ...code1... }, 'Name2' => sub { ...code2... }, }, 'none' ); cmpthese( $results ) ; $t = timeit($count, '...other code...') print "$count loops of other code took:",timestr($t),"\n"; $t = countit($time, '...other code...') $count = $t->iters ; print "$count loops of other code took:",timestr($t),"\n"; # enable hires wallclock timing if possible use Benchmark ':hireswallclock'; =head1 DESCRIPTION The Benchmark module encapsulates a number of routines to help you figure out how long it takes to execute some code. timethis - run a chunk of code several times timethese - run several chunks of code several times cmpthese - print results of timethese as a comparison chart timeit - run a chunk of code and see how long it goes countit - see how many times a chunk of code runs in a given time =head2 Methods =over 10 =item new Returns the current time. Example: use Benchmark; $t0 = Benchmark->new; # ... your code here ... $t1 = Benchmark->new; $td = timediff($t1, $t0); print "the code took:",timestr($td),"\n"; =item debug Enables or disable debugging by setting the C<$Benchmark::Debug> flag: Benchmark->debug(1); $t = timeit(10, ' 5 ** $Global '); Benchmark->debug(0); =item iters Returns the number of iterations. =back =head2 Standard Exports The following routines will be exported into your namespace if you use the Benchmark module: =over 10 =item timeit(COUNT, CODE) Arguments: COUNT is the number of times to run the loop, and CODE is the code to run. CO