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a performance question

php.internals

Ron Korving

20 years ago

If anybody should know this for certain, it's core developers, hence my
question here. I'm curious if type certainty requires an extra check, or a
check less.

Which of these is faster?

if ($str === 'abc') { }
if ($str == 'abc') { }

I expect the triple '=' to be faster, but I'd like to be sure.

Thank you,

Ron

Ants Aasma

20 years ago

I'd say if anybody should know this for certain, it's somebody who
bothers to benchmark it:

$ time php -r '$s="abc";for($i=0;$i<10000000;++$i);'

real    0m1.966s
user    0m1.634s
sys     0m0.072s
$ time php -r '$s="abc";for($i=0;$i<10000000;++$i) $s=="abc";'

real    0m3.974s
user    0m3.779s
sys     0m0.062s
$ time php -r '$s="abc";for($i=0;$i<10000000;++$i) $s==="abc";'

real    0m2.510s
user    0m2.320s
sys     0m0.056s

Ants

Ron Korving wrote: