Importing from Firefox

Jamie Wong edited this page Aug 20, 2018 · 2 revisions

To record a performance profile in Firefox, open the developer tools and switch to the performance tab.

Click the "Start Recording Performance" button.

"Start Recording Performance" button in Firefox

When you're done recording, click the "Stop Recording Performance" button.

"Stop Recording Performance" button in Firefox

When it's finished processing, click on "save".

"save" link in Firefox

This should save with a filename like profile.json.

You should be able to open that file in https://www.speedscope.app/.

To view it offline, you'll need to install speedscope via npm:

npm install -g speedscope

Then you should be able to open it like so:

speedscope /path/to/profile.json
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