[Phpmyadmin-devel] Is PMA_STR_binarySearchInArr needed?

[Piotr Przybylski]

2011/6/7 Marc Delisle <marc at infomarc.info>:
> 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
>>
> Looking for different strings gives me different results. For example,
> looking for "BOTH" and array_search() is faster that
> PMA_STR_binarySearchInArr().
>

I searched for 'WRITE' to get an almost-worst case scenario with
linear search, but I didn't expect results for array_search on other
machines to be that much different.

-- 
Piotr Przybylski