RE: Re: each or keys?


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RE: Re: each or keys?

by merlyn (Sage)

on Oct 11, 2000 at 03:42 UTC ( [id://36158]=note: print w/replies, xml )

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in thread each or keys?

Copying the hash means that keys and values might come out in different orders, and since you're quitting when the total reaches a certain point, you have a bogus benchmark.

I suggest setting all the values to be the same and rerunning the benchmarks.

-- Randal L. Schwartz, Perl hacker

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RE: RE: Re: each or keys?
by extremely (Priest) on Oct 11, 2000 at 04:00 UTC

Good call

Benchmark: running each, keys, each for at least 10 CPU seconds...
      each: 11 wallclock secs (10.51 usr +  0.00 sys = 10.51 CPU) @ 417.32/s (n=4386)
      keys: 11 wallclock secs (10.53 usr +  0.00 sys = 10.53 CPU) @ 286.89/s (n=3021)
      Rate keys each
keys 287/s   -- -31%
each 417/s  45%   --

This is with $top_hash{$i} = 50; and cmpthese(-10, { 'each' => \&e, 'keys' => \&k }); and otherwise the same as above.

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