1541516 - Allow instrumenting MozElement Custom Element performance using an environment variable

Status: RESOLVED FIXED

(Toolkit :: UI Widgets, task, P3)

Description

[Brian Grinstead [:bgrins]]

I believe it'd be useful in local development to track how long is spent inside of each Custom Element class, as a way to test if changes are helping or hurting performance.

Spinning this out of Bug 1515799 so it can be landed separately.

Comment 1

[Brian Grinstead [:bgrins]]

Attachment: Bug 1541516 - Instrument base custom element class and print call information in the console

If MOZ_INSTRUMENT_CUSTOM_ELEMENTS is set in the environment, then modify Custom Elements
to wrap each function and property lookup to keep a count and running time. Then print out
tables for each element at startup. Tables can be re-printed with MozElements.printInstrumentation().

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/a8c9a03ec27d
Instrument base custom element class and print call information in the console r=aswan

Comment 3

[Daniel Varga [:dvarga]]

https://hg.mozilla.org/mozilla-central/rev/a8c9a03ec27d