Issue #19437 has been updated by AMomchilov (Alexander Momchilov). Hey Robert, I appreciate your excitement, but could you please refrain from commenting unless it's meaningfully contributing to the discussion? You can up-vote this issue by clicking "like" in the top right corner? ---------------------------------------- Feature #19437: Add marking and sweeping time to GC.stat https://bugs.ruby-lang.org/issues/19437#change-101878 * Author: peterzhu2118 (Peter Zhu) * Status: Open * Priority: Normal ---------------------------------------- Pull Request: https://github.com/ruby/ruby/pull/7304 There is a `time` key in GC.stat that gives us the total time spent in GC. However, we don't know what proportion of the time is spent between marking and sweeping. This makes it difficult to tune the GC as we're not sure where to focus our efforts on. This PR adds keys `marking_time` and `sweeping_time` to GC.stat for the time spent marking and sweeping, in milliseconds. -- https://bugs.ruby-lang.org/