Javascript profile

Question

Javascript profile

rohitsethiyasnow opened this issue 4 years ago · 4 comments

Is it possible in boomerang to capture chrome trace and timeline data?

Answer 1 · 2020-03-31T12:08:06.000Z

Are there JavaScript APIs that can be used to pull this data from the page?

Answer 2 · 2020-03-31T12:49:06.000Z

I am not aware of any such APIs. But yeah chrome has a console.profile API which captures the js profile. What i wanted to see was if boomerang can capture similar JS profile and beacon it.

Answer 3 · 2020-03-31T13:14:23.000Z

Hello @rohitsethiyasnow

I am not sure if we have access to console.profile() from JavaScript. Also in the current Boomerang version we do not collect traces.

However there is an experimental chrome feature called "JavaScript Self-Profiling API Proposal
". Reference: https://github.com/WICG/js-self-profiling ... as a matter of fact there is a Facebook's Profiler Polyfill as well.

Answer 4 · 2020-03-31T13:19:30.000Z

As far as I know, console.profile captures the profile internally to the browser, it doesn't return it. We'd need an API that returns the information. JavaScript doesn't have access to browser internals for security reasons, so unless the browser gave us that data, we couldn't get it.