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#!/usr/bin/perl |
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# ->resume is not exactly cheap (it saves/restores a LOT |
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# of global variables), but shouldn't be slow. just to show |
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# how fast it is, this little proggie compares a normal subroutine |
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# call with two calls of transfer in a loop. |
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use Coro; |
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use Benchmark; |
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sub a($) { } |
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$a = bless {}, main::; |
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sub b { |
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my ($self) = shift; |
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$self->{b} = shift if @_; |
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$self->{b}; |
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} |
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$b = async { |
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# do a little unrolling... |
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while() { |
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cede; cede; cede; cede; cede; |
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cede; cede; cede; cede; cede; |
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} |
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}; |
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cede; |
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$main = $Coro::main; |
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*transfer = \&Coro::State::transfer; |
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sub doit0 { |
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while() { |
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# some unrolling here as well.. |
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transfer($c0, $main); transfer($c0, $main); |
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transfer($c0, $main); transfer($c0, $main); |
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transfer($c0, $main); transfer($c0, $main); |
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transfer($c0, $main); transfer($c0, $main); |
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} |
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} |
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sub doit1 { |
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while() { |
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# some unrolling here as well.. |
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transfer($c1, $main); transfer($c1, $main); |
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transfer($c1, $main); transfer($c1, $main); |
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transfer($c1, $main); transfer($c1, $main); |
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transfer($c1, $main); transfer($c1, $main); |
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} |
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} |
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$c0 = new Coro::State sub { |
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doit0(1,2,3,4,5,6,7,8,9); |
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}; |
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$c1 = new Coro::State sub { |
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doit1(1,2,3,4,5,6,7,8,9); |
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}; |
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#$c0->save (0); |
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#$c1->save (-1); |
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transfer($main, $c0); |
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transfer($main, $c1); |
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timethese 5000000, { |
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function => 'a(5); a(6)', |
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method => '$a->b(5); $a->b(6)', |
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cede => 'cede', |
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transfer0 => 'transfer($main, $c0)', |
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transfer1 => 'transfer($main, $c1)', |
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}; |
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