runtime: use clock_gettime instead of gettimeofday on darwin

clock_gettime has higher resolution than gettimeofday and is available
since macOS 10.12. Go 1.15 already requires at least macOS 10.12 and
thus clock_gettime can be used unconditionally (also see

Fixes #25633

Change-Id: I46305387212735e5d3a13e5f02ec90f3e6d546a4
Trust: Tobias Klauser <>
Run-TryBot: Tobias Klauser <>
TryBot-Result: Go Bot <>
Reviewed-by: Ian Lance Taylor <>
Reviewed-by: Cherry Zhang <>
3 files changed
tree: b5a21f861186fb84eadd46fc5c35b568f4715ad2
  1. .gitattributes
  2. .github/
  3. .gitignore
  11. api/
  12. doc/
  13. favicon.ico
  14. lib/
  15. misc/
  16. robots.txt
  17. src/
  18. test/

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