No, timethese doesn't do any cleanup for you. You're using a special global variable (@_), and that's not going to be cleaned up automatically for you. One option would be to use a different variable, one you could declare lexically with my; that way your array would go out of scope after each iteration of the benchmark, and you'd be starting from scratch each time, as it were.

If you do use lexicals, make sure that you declare the variable in the code that you're benchmarking; otherwise Benchmark won't be able to "see" your variable, because it won't be in the correct scope.

You could use something like this: 

    timethese(100, {
        first  => sub { my @foo = qw/bar foo/; my $last = pop @foo },
        second => sub { my @foo = qw/bar foo/; my $last = $foo[-1] },
    });

[download]
Or whatever you're benchmarking.

Is that the behavior I expected? I think yes, because frankly it wouldn't make much sense for Benchmark to mess about with the @_ you're playing with; it should do as little as possible, because for example, maybe you don't *want* cleanup of your variables. This allows you to have more control over what's happening.

In reply to Re: timethese by btrott
in thread timethese, and pushing array values by husker

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