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crypto/tls: mention cpu frequency scaling in "why does using GOMAXPROCS > 1 sometimes make my program slower?" #7791
When I was benchmarking TLS handshaking with http://play.golang.org/p/WZlt7mI4WN , I noticed that using GOMAXPROCS > 1 does make my program significantly slower (1.5x ~ 2x). And I found the reason to be CPU frequency scaling, because no threads run hot enough to stimulate CPU cores. May be worth mention that in the FAQ.
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