*** Submitted as
http://code.google.com/p/go/source/detail?r=42c8d3aadc40 ***
runtime: use vDSO clock_gettime for time.now & runtime.nanotime on
Linux/amd64
Performance improvement aside, time.Now() now gets real nanosecond
resolution
on supported systems.
Benchmark done on Core i7-2600 @ 3.40GHz with kernel 3.5.2-gentoo.
original vDSO gettimeofday:
BenchmarkNow 100000000 27.4 ns/op
new vDSO gettimeofday fallback:
BenchmarkNow 100000000 27.6 ns/op
new vDSO clock_gettime:
BenchmarkNow 100000000 24.4 ns/op
R=golang-dev, bradfitz, iant, iant
CC=golang-dev
http://codereview.appspot.com/6814103
http://codereview.appspot.com/6814103/
