We have detected a build metrics regression from push:

https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=13fa3e2aead6788c97e688fde0cfb8c5ee32cc72

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

Regressions:

4% compiler_metrics num_static_constructors windows2012-aarch64 opt aarch64 97.00 -> 101.00

You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=19387

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://developer.mozilla.org/en-US/docs/Mozilla/Performance/Automated_Performance_Testing_and_Sheriffing/Build_Metrics

*** Please let us know your plans within 3 business days, or the offending patch(es) will be backed out! ***

Unless I'm missing something, this is expected because accessibility (an entire module) has been disabled on ARM64 from the beginning due to build problems/crashes. Now that those are fixed, it has been enabled. No additional static constructors were added in this patch beyond those which are already present on Windows x86/x64 builds.