# It's intended that this script be run by hand.  It runs speed tests on

# hashlib functions; it does not test for correctness.

import sys, time

import hashlib

def creatorFunc():

    raise RuntimeError, "eek, creatorFunc not overridden"

def test_scaled_msg(scale, name):

    iterations = 106201/scale * 20

    longStr = 'Z'*scale

    localCF = creatorFunc

    start = time.time()

    for f in xrange(iterations):

        x = localCF(longStr).digest()

    end = time.time()

    print ('%2.2f' % (end-start)), "seconds", iterations, "x", len(longStr), "bytes", name

def test_create():

    start = time.time()

    for f in xrange(20000):

        d = creatorFunc()

    end = time.time()

    print ('%2.2f' % (end-start)), "seconds", '[20000 creations]'

def test_zero():

    start = time.time()

    for f in xrange(20000):

        x = creatorFunc().digest()

    end = time.time()

    print ('%2.2f' % (end-start)), "seconds", '[20000 "" digests]'

hName = sys.argv[1]

#

# setup our creatorFunc to test the requested hash

#

if hName in ('_md5', '_sha'):

    exec 'import '+hName

    exec 'creatorFunc = '+hName+'.new'

    print "testing speed of old", hName, "legacy interface"

elif hName == '_hashlib' and len(sys.argv) > 3:

    import _hashlib

    exec 'creatorFunc = _hashlib.%s' % sys.argv[2]

    print "testing speed of _hashlib.%s" % sys.argv[2], getattr(_hashlib, sys.argv[2])

elif hName == '_hashlib' and len(sys.argv) == 3:

    import _hashlib

    exec 'creatorFunc = lambda x=_hashlib.new : x(%r)' % sys.argv[2]

    print "testing speed of _hashlib.new(%r)" % sys.argv[2]

elif hasattr(hashlib, hName) and callable(getattr(hashlib, hName)):

    creatorFunc = getattr(hashlib, hName)

    print "testing speed of hashlib."+hName, getattr(hashlib, hName)

else:

    exec "creatorFunc = lambda x=hashlib.new : x(%r)" % hName

    print "testing speed of hashlib.new(%r)" % hName

try:

    test_create()

except ValueError:

    print

    print "pass argument(s) naming the hash to run a speed test on:"

    print " '_md5' and '_sha' test the legacy builtin md5 and sha"

    print " '_hashlib' 'openssl_hName' 'fast' tests the builtin _hashlib"

    print " '_hashlib' 'hName' tests builtin _hashlib.new(shaFOO)"

    print " 'hName' tests the hashlib.hName() implementation if it exists"

    print "         otherwise it uses hashlib.new(hName)."

    print

    raise

test_zero()

test_scaled_msg(scale=106201, name='[huge data]')

test_scaled_msg(scale=10620, name='[large data]')

test_scaled_msg(scale=1062, name='[medium data]')

test_scaled_msg(scale=424, name='[4*small data]')

test_scaled_msg(scale=336, name='[3*small data]')

test_scaled_msg(scale=212, name='[2*small data]')

test_scaled_msg(scale=106, name='[small data]')

test_scaled_msg(scale=creatorFunc().digest_size, name='[digest_size data]')

test_scaled_msg(scale=10, name='[tiny data]')