[Phpmyadmin-devel] Is PMA_STR_binarySearchInArr needed?

[Marc Delisle]

Piotr Przybylski a écrit :
> Hi,
> 
> For some time I was curious whether PMA_STR_binarySearchInArr is
> needed at all, and my test showed that there are faster (sometimes
> much faster) alternatives. Test for 100 000 iterations on PHP 5.3.4
> (Windows, i5 2,53 GHz core):
> 
> PMA_STR_binarySearchInArr:    2.6606s
> array_search:     1.8936s
> isset:            0.0102s
> array_key_exists: 0.0934s
> 
> Isset and array_key_exists require flipped array, but array_search is
> a drop-in replacement that works faster, even though it does a linear
> search. Code used to perform this test is at [1].
> 
> [1] http://pastebin.com/cJmpmCPh
> 

Piotr,
I tested on a 64-bit Linux machine (running as a VM under ESX 4.1) under 
PHP 5.3.6-RC3 and got different results (for current master):

Binary search:    0.6088
array_search:     2.0246
isset:            0.0068
array_key_exists: 0.0176



-- 
Marc Delisle
http://infomarc.info