time: make time.Since a few nanoseconds faster #70
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bradfitz
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Aug 11, 2023
This removes the unsafe/linkname and only uses the standard library. It's a bit slower, for now, but https://go.dev/cl/518336 should get us back. On darwin/arm64, without https://go.dev/cl/518336 pkg: tailscale.com/tstime/mono │ before │ after │ │ sec/op │ sec/op vs base │ MonoNow-8 16.20n ± 0% 19.75n ± 0% +21.92% (p=0.000 n=10) TimeNow-8 39.46n ± 0% 39.40n ± 0% -0.16% (p=0.002 n=10) geomean 25.28n 27.89n +10.33% And with it, MonoNow-8 16.34n ± 1% 16.93n ± 0% +3.67% (p=0.001 n=10) TimeNow-8 39.55n ± 15% 38.46n ± 1% -2.76% (p=0.000 n=10) geomean 25.42n 25.52n +0.41% Updates #8839 Updates tailscale/go#70 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
bradfitz
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to tailscale/tailscale
that referenced
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Aug 11, 2023
This removes the unsafe/linkname and only uses the standard library. It's a bit slower, for now, but https://go.dev/cl/518336 should get us back. On darwin/arm64, without https://go.dev/cl/518336 pkg: tailscale.com/tstime/mono │ before │ after │ │ sec/op │ sec/op vs base │ MonoNow-8 16.20n ± 0% 19.75n ± 0% +21.92% (p=0.000 n=10) TimeNow-8 39.46n ± 0% 39.40n ± 0% -0.16% (p=0.002 n=10) geomean 25.28n 27.89n +10.33% And with it, MonoNow-8 16.34n ± 1% 16.93n ± 0% +3.67% (p=0.001 n=10) TimeNow-8 39.55n ± 15% 38.46n ± 1% -2.76% (p=0.000 n=10) geomean 25.42n 25.52n +0.41% Updates #8839 Updates tailscale/go#70 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
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alexelisenko
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Feb 15, 2024
This removes the unsafe/linkname and only uses the standard library. It's a bit slower, for now, but https://go.dev/cl/518336 should get us back. On darwin/arm64, without https://go.dev/cl/518336 pkg: tailscale.com/tstime/mono │ before │ after │ │ sec/op │ sec/op vs base │ MonoNow-8 16.20n ± 0% 19.75n ± 0% +21.92% (p=0.000 n=10) TimeNow-8 39.46n ± 0% 39.40n ± 0% -0.16% (p=0.002 n=10) geomean 25.28n 27.89n +10.33% And with it, MonoNow-8 16.34n ± 1% 16.93n ± 0% +3.67% (p=0.001 n=10) TimeNow-8 39.55n ± 15% 38.46n ± 1% -2.76% (p=0.000 n=10) geomean 25.42n 25.52n +0.41% Updates tailscale#8839 Updates tailscale/go#70 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Alex Paguis <alex@windscribe.com>
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Already upstreamed (for Go 1.22) but cherry-picked to Tailscale's 1.21 tree:
27f103a
(https://go-review.googlesource.com/c/go/+/518336)
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