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. From previous tests I’ve performed, I’ve seen much lower Sunspider numbers. I suspect these results are due to a combination of older hardware, Windows 10 still being unfinished, and of course the fact these are beta browsers.

Chrome Canary started off OK:

sunspider_chrome_canary

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Firefox Nightly was noticeably slower:

sunspider_firefox_nightly

Microsoft Edge beat them both:

sunspider_edge

This is the only test Edge won, and it did so in style.

sunspider_beta_browsers