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system_spec.rb

  • Robert Speicher's avatar
    a64b7cd3
    Merge branch 'performance-clock-adjustments' into 'master' · a64b7cd3
    Robert Speicher authored and Robert Speicher's avatar Robert Speicher committed 
    Use clock_gettime for all performance timestamps

This MR adjusts the performance monitoring code to use `Process.clock_gettime` (thus `clock_gettime(3)`) instead of `Time.now`.

Using `Time.now` / `Time.new` adds more overhead than `Process.clock_gettime`, it also doesn't provide a way of getting timestamps in nanoseconds (which `Process.clock_gettime` does allow).

See merge request !4899
(cherry picked from commit 53ad9522)
    a64b7cd3
    History
    Merge branch 'performance-clock-adjustments' into 'master'
    Robert Speicher authored and Robert Speicher's avatar Robert Speicher committed 
    Use clock_gettime for all performance timestamps

This MR adjusts the performance monitoring code to use `Process.clock_gettime` (thus `clock_gettime(3)`) instead of `Time.now`.

Using `Time.now` / `Time.new` adds more overhead than `Process.clock_gettime`, it also doesn't provide a way of getting timestamps in nanoseconds (which `Process.clock_gettime` does allow).

See merge request !4899
(cherry picked from commit 53ad9522)
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