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tstime/mono: remove unsafe

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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>
This commit is contained in:
Brad Fitzpatrick
2023-08-10 22:18:11 -07:00
committed by Brad Fitzpatrick
parent cc3caa4b2a
commit a1b8d703d6
5 changed files with 5 additions and 9 deletions
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2
cmd/derper/depaware.txt
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@@ -116,7 +116,7 @@ tailscale.com/cmd/derper dependencies: (generated by github.com/tailscale/depawa
tailscale.com/tka from tailscale.com/client/tailscale+
W tailscale.com/tsconst from tailscale.com/net/interfaces
tailscale.com/tstime from tailscale.com/derp+
💣 tailscale.com/tstime/mono from tailscale.com/tstime/rate
tailscale.com/tstime/mono from tailscale.com/tstime/rate
tailscale.com/tstime/rate from tailscale.com/wgengine/filter+
tailscale.com/tsweb from tailscale.com/cmd/derper
tailscale.com/tsweb/promvarz from tailscale.com/tsweb