SunSpider is a JavaScript benchmark, probably one of the oldest ones around. We ran version 1.0.2, the most current one available.
For this benchmark, a lower number is better.
Chrome started off OK:
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Firefox was a tad faster:
Edge destroyed them both, finishing in less than half the time:
This is an old test, but every time I run it, the latest browsers manage to shave off a few more milliseconds.
