https://bugzilla.wikimedia.org/show_bug.cgi?id=29514
--- Comment #4 from Rin Nas <rin-...@ya.ru> 2011-06-27 09:07:00 UTC ---
Did you see source code? Try to look for "faster" and "speed" entries.
iconv and mbstring
* iconv() faster then mb_convert_encoding()
* mb_strlen() faster then strlen(utf8_decode())
* strlen(utf8_decode()) faster then iconv_strlen()
* mb_substr() faster then iconv_substr()
* mb_strpos() faster then iconv_strpos()
Other (hacks)
* preg_match('~~suSX') much faster (up to 4 times), then
mb_check_encoding($data, 'UTF-8')
* strtr() 2-3 times faster then mb_strtolower()
* preg_match_all('~.~suSX', $s, $m) faster then native on PHP
So PHP5 UTF-8 uses the fastest available method between mbstring, iconv and
native/hacks.
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