That's an impressive speedup!
Congrats on enabling this, everyone.
On 24/09/2020 14:56, Jan de Mooij wrote:
Warp is now enabled by default on Nightly, after positive feedback
from users dogfooding it [0,1].
Here are just a few of the Talos/Raptor graphs showing improvements
when Warp landed:
- 20% on Win64 GDocs loadtime: https://mzl.la/3cp6dAs
- 13% on Android Reddit SpeedIndex: https://mzl.la/2RUWdp8
- 18% on pdfpaint: https://mzl.la/2HtXb9W
- 8% on tp6 JS memory: https://mzl.la/3j2VwGb
- 8% on damp (devtools perf): https://mzl.la/3kLbhSM
Please let us know if you notice any improvements or regressions.
Thanks,
The Warp team
[0]
https://www.reddit.com/r/firefox/comments/itib6s/dogfooding_warp_on_nightly_new_js_jit_engine/
[1]
https://www.reddit.com/r/firefox/comments/iy2036/nightly_is_finally_feeling_as_fast_as_chromium/
On Tue, Sep 15, 2020 at 2:57 PM Jan de Mooij <jdemo...@mozilla.com> wrote:
Hi all,
The SpiderMonkey (JS) team has been working on a significant update to
our JITs called WarpBuilder (or just Warp) [0,1]. Before we enable
Warp by default in Nightly (hopefully next cycle in 83) we need your
help dogfooding it.
Warp improves performance by reducing the amount of internal type
information that is tracked, optimizing for a broader spectrum of
cases, and by leveraging the same CacheIR optimizations used by last
year’s BaselineInterpreter work [2]. As a result, Warp has a much
simpler design and improves responsiveness and page load performance
significantly (we're seeing 5-15% improvements on many visual metrics
tests). Speedometer is about 10% faster with Warp. The JS engine also
uses less memory when Warp is enabled.
To enable Warp in Nightly:
1. Update to a recent Nightly
2. Go to about:config and set the "javascript.options.warp" pref to true
3. Restart the browser
We're especially interested in stability issues and real-world
performance problems. Warp is currently slower on various synthetic JS
benchmarks such as Octane (which we will continue investigating in the
coming months) but should perform well on web content.
If you find any issues, please file bugs blocking:
https://bugzilla.mozilla.org/show_bug.cgi?id=1613592
If you notice any improvements, we'd love to hear about those too.
Finally, we want to thank our amazing contributors André Bargull and
Tom Schuster for their help implementing and porting many
optimizations.
Turning Warp on is only our first step, and we expect to see a lot of
new optimization work over the next year as we build on this. We are
excited for what the future holds here.
Thanks!
The Warp team
[0] WarpBuilder still utilizes the backend of IonMonkey so we don't
feel it has earned the WarpMonkey name just yet.
[1] https://bugzilla.mozilla.org/show_bug.cgi?id=1613592
[2]
https://hacks.mozilla.org/2019/08/the-baseline-interpreter-a-faster-js-interpreter-in-firefox-70/
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