Issue 6820120: code review 6820120: runtime: use clock_gettime to get ns resolution for tim... (Closed)
Descriptionruntime: use clock_gettime to get ns resolution for time.now & runtime.nanotime
For Linux/{386,arm}, FreeBSD/{386,amd64,arm}, NetBSD/{386,amd64}, OpenBSD/{386,amd64}.
Note: our Darwin implementation already has ns resolution.
Linux/386 (Core i7-2600 @ 3.40GHz, kernel 3.5.2-gentoo)
benchmark old ns/op new ns/op delta
BenchmarkNow 110 118 +7.27%
Linux/ARM (ARM Cortex-A8 @ 800MHz, kernel 2.6.32.28 android)
benchmark old ns/op new ns/op delta
BenchmarkNow 625 542 -13.28%
Linux/ARM (ARM Cortex-A9 @ 1GHz, Pandaboard)
benchmark old ns/op new ns/op delta
BenchmarkNow 992 909 -8.37%
FreeBSD 9-REL-p1/amd64 (Dell R610 Server with Xeon X5650 @ 2.67GHz)
benchmark old ns/op new ns/op delta
BenchmarkNow 699 695 -0.57%
FreeBSD 9-REL-p1/amd64 (Atom D525 @ 1.80GHz)
benchmark old ns/op new ns/op delta
BenchmarkNow 1553 1658 +6.76%
OpenBSD/amd64 (Dell E6410 with i5 CPU M 540 @ 2.53GHz)
benchmark old ns/op new ns/op delta
BenchmarkNow 1262 1236 -2.06%
OpenBSD/i386 (Asus eeePC 701 with Intel Celeron M 900MHz - locked to 631MHz)
benchmark old ns/op new ns/op delta
BenchmarkNow 5089 5043 -0.90%
NetBSD/i386 (VMware VM with Core i5 CPU @ 2.7GHz)
benchmark old ns/op new ns/op delta
BenchmarkNow 277 278 +0.36%
NetBSD/amd64 (VMware VM with Core i5 CPU @ 2.7Ghz)
benchmark old ns/op new ns/op delta
BenchmarkNow 103 105 +1.94%
Thanks Maxim Khitrov, Joel Sing, and Dave Cheney for providing benchmark data.
Patch Set 1 #Patch Set 2 : diff -r 42c8d3aadc40 https://code.google.com/p/go/ #Patch Set 3 : diff -r 42c8d3aadc40 https://code.google.com/p/go/ #Patch Set 4 : diff -r 42c8d3aadc40 https://code.google.com/p/go/ #Patch Set 5 : diff -r 42c8d3aadc40 https://code.google.com/p/go/ #Patch Set 6 : diff -r 42c8d3aadc40 https://code.google.com/p/go/ #Patch Set 7 : diff -r 42c8d3aadc40 https://code.google.com/p/go/ #
Total comments: 4
Patch Set 8 : diff -r 422c00e8e022 https://code.google.com/p/go/ #Patch Set 9 : diff -r dc4a3f6ba179 https://code.google.com/p/go/ #Patch Set 10 : diff -r bbc0024af4a4 https://code.google.com/p/go/ #Patch Set 11 : diff -r 8eab544488a8 https://code.google.com/p/go/ #Patch Set 12 : diff -r b7482cb67996 https://code.google.com/p/go/ #
Total comments: 3
Patch Set 13 : diff -r 9d15015fc6e2 https://code.google.com/p/go/ #
Total comments: 2
Patch Set 14 : diff -r 7ea3674ce4b5 https://code.google.com/p/go/ #Patch Set 15 : diff -r 3684de5292bf https://code.google.com/p/go/ #
MessagesTotal messages: 13
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