import hashlib, threading, time

class Hasher(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)
        self.setDaemon(True)
        self.start()
        
    def run(self):
        md = hashlib.sha1()
        buf = b'a'*1024*1024
        for i in range(1000):
            md.update(buf)
        print(md.hexdigest())

teststring = 'bla'.encode()
md = hashlib.new('md5', teststring)
print(md.hexdigest())

md = hashlib.new('md5')
md.update(teststring)
print(md.hexdigest())

md = hashlib.md5(teststring)
print(md.hexdigest())

md = hashlib.md5()
md.update(teststring)
print(md.hexdigest())

        
t = time.time()
threads = [Hasher() for i in range(2)]
for thread in threads:
    thread.join()

print(time.time() - t)