I would like to do something like that: 
use Memchmark qw(cmpthese);

my @data = 1..$ARGV[0];
cmpthese(-1, { foo => sub { my @out = foo(@data) },
               bar => sub { my @out = bar(@data) } });

[download]
but unfortunately, Memchmark doesn't exist yet... so my question is: how can memory usage be measured?

BTW, I don't need accurate numbers, an error around 25% could be admissible. I don't need it to be portable either, it should just work on Linux.

update: I have just uploaded Memchmark to CPAN.

In reply to "benchmarking" memory usage by salva

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