擅长:python、mysql、java
<p>也许是个幼稚的测试。。。但这似乎取决于你的散列量。2块sha512比4块sha256快?</p>
<pre><code>>>> import timeit
>>> import hashlib
>>> for sha in [ x for x in dir(hashlib) if x.startswith('sha') ]:
... t = timeit.Timer("hashlib.%s(data).hexdigest()" % sha,"import hashlib; data=open('/dev/urandom','r').read(1024)")
... print sha + "\t" + repr(t.timeit(1000))
...
sha1 0.0084478855133056641
sha224 0.034898042678833008
sha256 0.034902095794677734
sha384 0.01980900764465332
sha512 0.019846916198730469
</code></pre>