pions / srtp / 31

42%

master: 41%

Pull #6

travis-ci

Optimize session auth tag generation

I profiled my application and crypto/hmac.New was taking 5.71% of the
total CPU time. Since the session key does not change, you can call
crypto/hmac.Reset() instead of making a new object. This reuses previous
work done for the key.

name                 old time/op  new time/op  delta
EncryptRTP-8         2.17µs ± 4%  1.90µs ± 5%  -12.79%  (p=0.008 n=5+5)
EncryptRTPInPlace-8  2.14µs ± 4%  1.84µs ± 4%  -13.79%  (p=0.008 n=5+5)

35 of 35 new or added lines in 3 files covered. (100.0%)

326 of 767 relevant lines covered (42.5%)

10.65 hits per line