tree c95ef79e50410fcfcefea55eb4943de38cae91e2
parent ed8c5501c743d702016044e10c92e4a211765502
author Dmitriy Vyukov <dvyukov@google.com> 1375969317 +0400
committer Dmitriy Vyukov <dvyukov@google.com> 1375969317 +0400
golang-hg 23e06fccd3b974ab1360ccf6692cde677db96f50

runtime: use GetQueuedCompletionStatusEx on windows if available
GetQueuedCompletionStatusEx allows to dequeue a batch of completion
notifications, which is more efficient than dequeueing one by one.

benchmark                           old ns/op    new ns/op    delta
BenchmarkClientServerParallel4         100605        90945   -9.60%
BenchmarkClientServerParallel4-2        90225        74504  -17.42%

R=golang-dev, alex.brainman
CC=golang-dev
https://golang.org/cl/12436044