FWIW, the impact from bug 165857 can be clearly observed on the telemetry graphs for the 95th percentile of the CYCLE_COLLECTOR_MAX_PAUSE probe (see bug 1677569): https://mzl.la/3lEiOn3 The numbers went up from ~40 to ~53 when bug 1618292 landed (May 11), and down to ~49 when bug 165857 landed (Sept 24). So maybe the remaining ~9 come from this bug?
Bug 1667316 Comment 2 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
FWIW, the impact from bug 1658571 can be clearly observed on the telemetry graphs for the 95th percentile of the CYCLE_COLLECTOR_MAX_PAUSE probe (see bug 1677569): https://mzl.la/3lEiOn3 The numbers went up from ~40 to ~53 when bug 1618292 landed (May 11), and down to ~49 when bug 1658571 landed (Sept 24). So maybe the remaining ~9 come from this bug?