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
)