SunSpider is a JavaScript benchmark, probably one of the oldest ones around. We ran version 1.0.2, the latest and last version released (SunSpider is no longer maintained).

For this benchmark, a lower number is better.

Chrome started off OK:

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Firefox did a lot worse:

Edge managed to slip right underneath Chrome:

Brave did a bit worse than the other Chromium browsers, but better than Firefox:

This is an old test, so it shouldn’t be taken on its own.