Python比PHP慢,以获得索引位置

我很惊讶地发现Python比PHP更慢以获得索引位置.有没有办法提高Python的性能？

例如：

在PHP中它花了：18.169965982437

<?PHP
$time_start = microtime(true);
$needle = file_get_contents("needle.wav", false, null, 46);

foreach(range(0, 10000) as $num) {
   $haystack = file_get_contents("haystack.wav");
   $match = strpos($haystack,$needle);
}

$time_end = microtime(true);

$finishTime = $time_end - $time_start;
echo $finishTime;
?>

在Python中它花了：23.6319999695

import time
import math
def microtime(get_as_float = False) :
    if get_as_float:
        return time.time()
    else:
        return '%f %d' % math.modf(time.time())

time_start = microtime(True)
needle = open("needle.wav","rb").read()

for x in range(0, 10000):
    haystack = open("haystack.wav","rb").read()
    match = haystack.index(needle[46:])

time_end = microtime(True)
finishTime = time_end - time_start
print finishTime

解决方法:

等效的python代码是这样的：

needle = open("needle.wav", "rb").read()[46:]

for x in range(0, 10000):
    haystack = open("haystack.wav", "rb").read()
    match = haystack.index(needle)