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mozilla-mobile / perf-frontend-issues

A repository to hold issues related to front-end mobile application performance.
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Find cause of 200ms Moto G5 improvement between Mar 25 and Apr 7 #196

Closed mcomella closed 3 years ago

mcomella commented 3 years ago

Batch this work with https://github.com/mozilla-mobile/fenix/issues/19173

On the moto G5, we noticed ~200ms drop in start time between Mar 25 and Apr 7 (graphs). It appears in fenix: image

in geckoview: image

sparky requested a backfill and will report back – we might be able to find what happened in GeckoView automatically. Note: the backfill can only go back until the gecko driver change so hopefully it landed after that.

If that doesn't work, let's investigate/bisect by hand!

MarcLeclair commented 3 years ago

This could be difficult to do and the time it would take isn't worth the end result. We could re-open this issue if we ever have a script / system to backfill the missing data. If we do, we could try to just run all the commits between our two commits showed in the graph above.