My question is: why write(''.join(...)) works slowly than
writelines(...)? Here's the code:
import sys
import random
#try:
#import psyco
#psyco.full()
#except ImportError:
#pass
def encrypt(key, infile, outfile, bufsize=65536):
random.seed(key)
in_buf = infile.read(bufsize)
while in_buf:
outfile.write(''.join(chr(ord(char) ^ random.randint(0, 255))
for char in in_buf))
in_buf = infile.read(bufsize)
if __name__ == '__main__':
import time
key = int(sys.argv[1])
infile = open(sys.argv[2], 'rb')
outfile = open(sys.argv[3], 'wb')
t = time.time()
encrypt(key, infile, outfile)
print time.time() - t
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