4 ms·

Firefox 4's JägerMonkey JIT status

• adbge 16y ago
  Once this is merged into the main dev branch of Firefox, I'll build that and switch off of Chrome. The main advantage of WebKit at this point is that their JavaScript implementation is an order of magnitude faster. Considering Chrome's GTK integration is god awful (on my box anyways), I can't wait.
  • thaumaturgy 16y ago
    Firefox 4 still has a little ways to go (of course). I've been running the beta since it came out. I accidentally discovered a neat DoS in Firefox 4 while working on some JS: the alert loop from hell is persistent even after you close the tab. IIRC, in 3 it was possible to close the tab in between alert()s and they would go away; in 4, you'll have to kill and restart Firefox to get rid of them. Chrome still has an advantage there.
    • modeless 16y ago
      They're working on fixing this the Right Way and right now it's on the list for Firefox 4: https://bugzilla.mozilla.org/show_bug.cgi?id=562258 https://bugzilla.mozilla.org/show_bug.cgi?id=562258
  • bokbar 16y ago
    Wow, what do you do with your browser that you absolutely need to have a JS performance which is an order of magnitude better than FF 3.6? Just curious...
    • lispygem 16y ago
      What's up with downvoting? It's a great question, I'm intrigued by adbge performance requirements as well.
    • GeneralMaximus 16y ago
      1. Facebook 2. Google Wave 3. Google Docs 4. And a bunch of other webapps I'm forgetting ... Try out Wave on an older version of Firefox (say, 3.0 or even something from the 2.x branch if you're adventurous). It totally destroys the browser.
    • tsuraan 16y ago
      High performance isn't just about getting stuff done faster, it can also be thought of as getting the same amount done in less CPU time. When I'm running on batteries, my laptop's CPUs are running at 800MHz, and I get about 8-10 hours of battery life. If something's making my computer work, my CPUs go up to 2.4GHz, and my battery life plummets. More efficient javascript engines should be able to do the same work with less battery use, which makes me happy.
    • Perceval 16y ago
      http://www.folklore.org/StoryView.py?project=Macintosh&story=Saving_Lives.txt http://www.folklore.org/StoryView.py?project=Macintosh&s... "Well, let's say you can shave 10 seconds off of the boot time. Multiply that by five million users and thats 50 million seconds, every single day. Over a year, that's probably dozens of lifetimes. So if you make it boot ten seconds faster, you've saved a dozen lives. That's really worth it, don't you think?" Those few seconds add up.
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• deleted 16y ago
  [deleted]
• pkulak 16y ago
  I like the metal umlaut. http://en.wikipedia.org/wiki/Metal_umlaut http://en.wikipedia.org/wiki/Metal_umlaut
  • johkra 16y ago
    Actually "Jäger" is the german word for "hunter" and it's always written with umlaut. No metal umlaut for you. ;-)
• kevinherron 16y ago
  Grrr. Graphs without labeled and meaningful axes and graphs without legends bother me a little too much I think :( Anyone know what the other lines are?
  • ericflo 16y ago
    They're given better context here: http://www.arewefastyet.com/ http://www.arewefastyet.com/
    • kevinherron 16y ago
      Thanks!
• saikat 16y ago
  Looks promising. Has anyone done benchmarks on Canvas performance in Firefox 4?
  • natmaster 16y ago
    Not sure if there's any graphs on the web, but my own benchmarks have shown it (with hardware acceleration enabled) slightly better than ie9 preview 3, which is many orders of magnitude ahead of everything else (opera's actually not bad though). Keep in mind I have a pretty good graphics card, so that helps with the acceleration.
• ck2 16y ago
  Now they need to address the rendering performance.
  • tiles 16y ago
    Have you tried Firefox 4 betas? (Legitimate question.) It feels significantly faster than 3 on my machines. Much further on the track of a Chrome-like browsing experience, though there's still many areas it can improve before release. I'm personally waiting on Electrolysis to speed up the browsing experience. Having a monolithic browser, slower or not than separate processes, just makes it feel more sluggish than it is.
  • Perceval 16y ago
    They've landed "lazy frame construction" which improves rendering performance by an order of magnitude in some cases: http://tinikkel.wordpress.com/2010/05/24/lazy-frame-construction/ http://tinikkel.wordpress.com/2010/05/24/lazy-frame-construc...