Make XOR faster by using temporary local variable
Make XOR faster by using temporary local variable

10MiB send and receive by echo_client.py

Before
Send: 4.468455 s, Receive: 4.624501 s
After
Send: 2.736184 s, Receive: 2.824285 s
Review URL: http://codereview.appspot.com/6078044
google/pywebsocket,googlearchive/pywebsocket,google/pywebsocket,GoogleChromeLabs/pywebsocket3,googlearchive/pywebsocket,google/pywebsocket,googlearchive/pywebsocket,GoogleChromeLabs/pywebsocket3,GoogleChromeLabs/pywebsocket3