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Comment by mattsop | Hacker News Reader

Diamonds was a good game - last two, opponent heavily outgunning me, he builds a bridge in my direction, runs across it, is sent flying into the blue abyss on a springboard I'd dropped at the same time.

Sadly tho, it's not getting anywhere near a steady frame rate in Firefox on my 4790k @ 3440x1440.

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Lol sounds like an epic last play :) In terms of performance, Firefox is about 40% slower than Chromium-based browser or Safari, basically purely in the performance of Spidermonkey. We have tried to optimize on Firefox in the past, however the development tools there make it difficult to determine what the problem might be beyon "everything is slower". For V8 we have the Chromium tracing tools that les us understand where V8 is spending time on potentially unoptimized code, or on megamorphic property access. Finally, unfortunately Firefox is currently used by 1% of our players, so it's hard to find time to improve it.

I would love to know how vanilla Chromium performed on the same machine! https://download-chromium.appspot.com/

The springboard trap is a classic, another fun one is the baseball bat to send people flying. It’s really underrated if you’re behind the upgrade curve.

Performance wise we find Firefox approximately halves the performance sadly, mostly in the speed of execution of the JS code. Both Safari and Chromium based browsers perform significantly better. Games really expose the differences in the various engine implementations because they rely on executing a lot of code all the time. That said we have an enormous amount of head room to optimise the engine so will make progress so it’s less of an issue.

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