5 ms·

Maglev: Chrome’s New JIT Compiler

53 points by tim_sw 3y ago

gravypod 3y ago
(Opinions are my own) Funny name clash: https://research.google/pubs/pub44824/ https://research.google/pubs/pub44824/
- deleted 3y ago
  [deleted]
- jchw 3y ago
  As a xoogler, I was thinking the same thing. I assume they knew from the get-go, because well, I can't see how they wouldn't. But I guess it doesn't matter all that much, anyway.
  - 1letterunixname 3y ago
    Have to have a successful internal brand to avoid the next round of layoffs. Now with extra stretch milestones!
- ksec 3y ago
  And Maglev is also an Ruby JIT [1] compiler [1] https://maglev.github.io https://maglev.github.io
saagarjha 3y ago
This doesn’t really say much about how it works :(
- deleted 3y ago
  [deleted]
ksec 3y ago
>The most relevant web benchmarks today are Speedometer, MotionMark, and Jetstream. Being a Mid-Tier JIT, am I correct to assume ( I may be wrong ) it brings very little benefits to my day to day browsing if most of my usage are Web page only? My only JS heavy site is Feedly, second being Twitter. I am thinking if there are any benchmarks for testing JPEG, Photos, HTML and CSS Rendering responsiveness and speed.
- pawelmurias 3y ago
  Without the sites being JS heavy shouldn't everything be fast enough already?
- killingtime74 3y ago
  This is a JIT for JavaScript...Why would you benchmark non JavaScript things.
- verwaest 3y ago
  Actually this concern is exactly why we built Maglev: A very fast JIT that can generate decent enough code very early so it can help even if you're not running tight benchmarks. In fact, the JIT by itself isn't particularly good at the traditional benchmarks yet. It's just very fast, and the code is most often good enough for real browsing usecases.
sroussey 3y ago
src: https://chromium.googlesource.com/v8/v8/+/refs/heads/main/src/maglev/ https://chromium.googlesource.com/v8/v8/+/refs/heads/main/sr...
- Genbox 3y ago
  How devs can work with code that breaks at 80 characters in this day and age is beyond me.
  - birdboat00 3y ago
    imho modern code is in general no very readable a lot of the time.
grumpyprole 3y ago
Lots of performance benchmarks but no measurements for power efficiency. Granted this is not easy, but it's more of a requirement than developing more performance benchmarks IMHO. My guess is that most people would rather Chrome improve power efficiency as a priority, which is why many use Safari on the Mac instead of Chrome.
- seanmcdirmid 3y ago
  I thought chrome was really popular on Macs? It’s on iOS where safaris rules.
  - deleted 3y ago
    [deleted]
  - artoale 3y ago
    Yeah, I believe you're right: https://netmarketshare.com/browser-market-share.aspx?options=%7B%22filter%22%3A%7B%22%24and%22%3A%5B%7B%22platform%22%3A%7B%22%24in%22%3A%5B%22Mac%20OS%22%5D%7D%7D%5D%7D%2C%22dateLabel%22%3A%22Trend%22%2C%22attributes%22%3A%22share%22%2C%22group%22%3A%22browser%22%2C%22sort%22%3A%7B%22share%22%3A-1%7D%2C%22id%22%3A%22browsersDesktop%22%2C%22dateInterval%22%3A%22Monthly%22%2C%22dateStart%22%3A%222022-04%22%2C%22dateEnd%22%3A%222023-03%22%2C%22segments%22%3A%22-1000%22%7D https://netmarketshare.com/browser-market-share.aspx?options...
- ygra 3y ago
  They do mention reduced power consumption in the opening paragraph. Usually executing the code you want to execute faster also translates to the CPU sleeping earlier again and this increased battery life.

53 points by tim_sw 3y ago

gravypod 3y ago

(Opinions are my own) Funny name clash: https://research.google/pubs/pub44824/ https://research.google/pubs/pub44824/

deleted 3y ago
[deleted]
jchw 3y ago
As a xoogler, I was thinking the same thing. I assume they knew from the get-go, because well, I can't see how they wouldn't. But I guess it doesn't matter all that much, anyway.
- 1letterunixname 3y ago
  Have to have a successful internal brand to avoid the next round of layoffs. Now with extra stretch milestones!
ksec 3y ago
And Maglev is also an Ruby JIT [1] compiler [1] https://maglev.github.io https://maglev.github.io

saagarjha 3y ago

This doesn’t really say much about how it works :(

deleted 3y ago
[deleted]

ksec 3y ago

>The most relevant web benchmarks today are Speedometer, MotionMark, and Jetstream. Being a Mid-Tier JIT, am I correct to assume ( I may be wrong ) it brings very little benefits to my day to day browsing if most of my usage are Web page only? My only JS heavy site is Feedly, second being Twitter. I am thinking if there are any benchmarks for testing JPEG, Photos, HTML and CSS Rendering responsiveness and speed.

pawelmurias 3y ago
Without the sites being JS heavy shouldn't everything be fast enough already?
killingtime74 3y ago
This is a JIT for JavaScript...Why would you benchmark non JavaScript things.
verwaest 3y ago
Actually this concern is exactly why we built Maglev: A very fast JIT that can generate decent enough code very early so it can help even if you're not running tight benchmarks. In fact, the JIT by itself isn't particularly good at the traditional benchmarks yet. It's just very fast, and the code is most often good enough for real browsing usecases.

sroussey 3y ago

src: https://chromium.googlesource.com/v8/v8/+/refs/heads/main/src/maglev/ https://chromium.googlesource.com/v8/v8/+/refs/heads/main/sr...

Genbox 3y ago
How devs can work with code that breaks at 80 characters in this day and age is beyond me.
- birdboat00 3y ago
  imho modern code is in general no very readable a lot of the time.

grumpyprole 3y ago

Lots of performance benchmarks but no measurements for power efficiency. Granted this is not easy, but it's more of a requirement than developing more performance benchmarks IMHO. My guess is that most people would rather Chrome improve power efficiency as a priority, which is why many use Safari on the Mac instead of Chrome.

seanmcdirmid 3y ago
I thought chrome was really popular on Macs? It’s on iOS where safaris rules.
- deleted 3y ago
  [deleted]
- artoale 3y ago
  Yeah, I believe you're right: https://netmarketshare.com/browser-market-share.aspx?options=%7B%22filter%22%3A%7B%22%24and%22%3A%5B%7B%22platform%22%3A%7B%22%24in%22%3A%5B%22Mac%20OS%22%5D%7D%7D%5D%7D%2C%22dateLabel%22%3A%22Trend%22%2C%22attributes%22%3A%22share%22%2C%22group%22%3A%22browser%22%2C%22sort%22%3A%7B%22share%22%3A-1%7D%2C%22id%22%3A%22browsersDesktop%22%2C%22dateInterval%22%3A%22Monthly%22%2C%22dateStart%22%3A%222022-04%22%2C%22dateEnd%22%3A%222023-03%22%2C%22segments%22%3A%22-1000%22%7D https://netmarketshare.com/browser-market-share.aspx?options...
ygra 3y ago
They do mention reduced power consumption in the opening paragraph. Usually executing the code you want to execute faster also translates to the CPU sleeping earlier again and this increased battery life.