Do telemetry performance tests respect flags?

[Ian Barkley-Yeung]

If I want to compare the results of a telemetry performance test with a flag on and off, is it enough to just go to chrome://flags before the test, turn the flag off, run the test, turn the flag on, and run the test again?

Thanks

Ian

[John Chen]

Changing flags through chrome://flags isn't recommended. Most flags should have corresponding command line version, and you can add the right command line option to extra_browser_args. Grep for extra_browser_args in tools/perf/page_sets for examples.