PHP中对各种加密算法、Hash算法的速度测试对比代码

PHP 的Hash算法是比较常用的，现在的MD5有时候不太安全，就得用到Hash_algos（）中的其它算法，下面进行了一个性能的比较。
php代码：

define（"testtime", 50000）;$algos = hash_algos（）;foreach（$algos as $algo） {$st = microtime（）;for（$i = 0; $i < testtime; $i++） {hash（$algo, microtime（）.$i）;}$et = microtime（）;list（$ss, $si） = explode（" ", $st）;list（$es, $ei） = explode（" ", $et）;$time[$algo] = $ei + $es - $si - $ss;}asort（$time, SORT_NUMERIC）;echo "";print_r（$time）;Array（[crc32b] => 0.14577506593323[crc32] => 0.14600901216125[adler32] => 0.14769597711182[md4] => 0.1584680151825[md5] => 0.15956400747681[salsa20] => 0.16176804933166[salsa10] => 0.16325911569214[tiger128,3] => 0.16543607070923[sha1] => 0.16547892630005[tiger160,3] => 0.16672711079407[tiger192,3] => 0.16793211837769[tiger128,4] => 0.16802901655579[sha224] => 0.16959108877563[tiger160,4] => 0.1713979150238[tiger192,4] => 0.1717759589386[sha256] => 0.17396298696899[ripemd256] => 0.17431005943298[ripemd128] => 0.17437094918823[ripemd320] => 0.17870710316467[haval160,3] => 0.18147005220032[haval256,3] => 0.18150104528809[haval224,3] => 0.18176211320496[sha512] => 0.18234492471313[haval192,3] => 0.18296506645203[ripemd160] => 0.18318411643982[haval128,3] => 0.18408892243958[sha384] => 0.18502903718567[haval128,4] => 0.18848111178589[haval256,4] => 0.18875202952576[haval160,4] => 0.1895639828186[haval224,4] => 0.19041207319641[haval192,4] => 0.19101205462646[whirlpool] => 0.19728892146301[haval256,5] => 0.19996902294922[haval160,5] => 0.20026498704529[haval192,5] => 0.20072503967285[haval128,5] => 0.20132308227539[haval224,5] => 0.2025869493103[gost] => 0.24892493852234[snefru256] => 0.28652299385071[snefru] => 0.29043891609192[md2] => 0.6300178873291）