import zlib, threading, time

class Compressor(threading.Thread):
    def __init__(self, compressobj):
        threading.Thread.__init__(self)
        self.dummy = '\00' * ((1024*10)+1)
        self.co = compressobj
        self.start()
        
    def run(self):
        for i in range(5000):
            self.co.compress(self.dummy)
            zlib.adler32(self.dummy)
            zlib.crc32(self.dummy)
        
        
if __name__ == "__main__":
    t = time.time()
    co = zlib.compressobj()
    compressors = [Compressor(co) for i in range(10)]
    for c in compressors:
        c.join()
    print("Done: %.2f" % (time.time() - t))