1281154 - 8-15% tp5o slope creep regression on all platform when uplifting Firefox 49 to Aurora

Status: RESOLVED WONTFIX

(Testing :: Talos, defect)

Description

[Joel Maher ( :jmaher ) (UTC -8)]

I have been looking at tp5o summary regressions on the uplift to aurora and there are really no corresponding regressions on inbound.

e10s:
https://treeherder.mozilla.org/perf.html#/graphs?timerange=7776000&series=%5Bmozilla-inbound,6a48ac54b45a24ccd037d18e2d58b0472c4ccd6a,1,1%5D&series=%5Bmozilla-inbound,eb31031a3dab0666ab89e805825e895fb7783e51,1,1%5D&series=%5Bmozilla-inbound,e9786d3bc11a5fff1fa013567494164638d623e9,1,1%5D&series=%5Bmozilla-inbound,e245284b48f832bdfaa49fcd9f425ccdbc94e284,1,1%5D&zoom=1460831056462.7876,1466035600571.042,221.27633360681924,282.9863707815404

non-e10s:
https://treeherder.mozilla.org/perf.html#/graphs?timerange=7776000&series=%5Bmozilla-inbound,8529630f826184f9f19234a80b3c8c210815c34f,1,1%5D&series=%5Bmozilla-inbound,7f12b5c1acd3d3759b2609220845a56c953d87c3,1,1%5D&series=%5Bmozilla-inbound,738cee074af3555260ca2bad214308becbc33d2c,1,1%5D&series=%5Bmozilla-inbound,7d6d0a62f7a2126944a5e7f463ac524c6f771fd3,1,1%5D&zoom=1460831056462.7876,1466035600571.042,221.27633360681924,282.9863707815404

the one alert in non-e10s was related to a backed out changeset.

This doesn't have a trend past the previous 6 weeks, instead it seems to be just a 6 week trend.

Comment 1

[Joel Maher ( :jmaher ) (UTC -8)]

some alerts to find this in the future:
https://treeherder.mozilla.org/perf.html#/alerts?id=1493

Comment 2

[Joel Maher ( :jmaher ) (UTC -8)]

half of this is fixed by the network prefetch work, see these improvement alerts:
https://treeherder.mozilla.org/perf.html#/alerts?id=1583

Comment 3

[Joel Maher ( :jmaher ) (UTC -8)]

we have shipped this and didn't see this in v.50.