1593292 - 2.19 - 2.23% Resident Memory (windows7-32, windows7-32-shippable) regression on push a67173efac2602cd62cc39b7bc520461ba61f130 (Thu October 31 2019)

Status: RESOLVED WONTFIX

(Core :: Layout: Text and Fonts, defect)

Description

[Marian Raiciof [:marauder]]

We have detected an awsy regression from push:

https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=a67173efac2602cd62cc39b7bc520461ba61f130

As author of one of the patches included in that push, we need your help to address this regression.

Regressions:

2% Resident Memory windows7-32-shippable opt 606,693,040.74 -> 620,249,905.99
2% Resident Memory windows7-32 opt 603,642,088.76 -> 616,847,791.88

You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=23644

On the page above you can see an alert for each affected platform as well as a link to a graph showing the history of scores for this test. There is also a link to a treeherder page showing the jobs in a pushlog format.

To learn more about the regressing test(s), please see: https://wiki.mozilla.org/AWSY/Tests

Comment 1

[Jonathan Kew [:jfkthame]]

Bug 1592626 changed the default fonts we use for CJK content when no language/locale indication is present; the fonts we now use tend to be larger (which is kind of the whole point -- they have more complete character coverage), and so an increase in memory usage is expected.

Real users will be mostly unaffected, I suspect: if they're reading actual Chinese pages, these fonts probably end up getting loaded anyhow; and if they're reading Japanese pages, their locale settings probably result in the (smaller) Japanese fonts being used.

So I think this is WONTFIX.