4 ms·

How much Rust is actually in the new Firefox? I'm not seeing any based on a casual click-around in the repo, though I'll freely admit I haven't scanned the enti

How much Rust is actually in the new Firefox? I'm not seeing any based on a casual click-around in the repo, though I'll freely admit I haven't scanned the entire source tree. Edit: if there is any, can someone give me a link to the part of the source tree that has it?

coffee-- 9y ago
the FIDO U2F code is rust: http://searchfox.org/mozilla-central/source/dom/webauthn/u2f-hid-rs http://searchfox.org/mozilla-central/source/dom/webauthn/u2f... otherwise here's the list: http://searchfox.org/mozilla-central/search?q=&path=*.rs%24 http://searchfox.org/mozilla-central/search?q=&path=*.rs%24
- Turing_Machine 9y ago
  Thanks.
kenhwang 9y ago
Read about the first bit of Rust shipping here: https://hacks.mozilla.org/2016/07/shipping-rust-in-firefox/ https://hacks.mozilla.org/2016/07/shipping-rust-in-firefox/ And many of the Rust things that make FF56+ fast can be found here: https://wiki.mozilla.org/Quantum https://wiki.mozilla.org/Quantum
- noncoml 9y ago
  Great pointers, thanks. Do they also have any write-up on how did they find Rust during these changes? Was the back count lower than usual? Did the see an increase on productivity?
  - 482794793792894 9y ago
    These components were built as part of the Servo project and then ported to Firefox, so you'd probably just want to ask the Servo team directly. You can find them on IRC, in the channel #servo on irc.mozilla.org. There is https://blog.servo.org/ https://blog.servo.org/, but it's mostly gradual updates on things, not a general overview.
kibwen 9y ago
I don't know if there's any one location for all the Rust code; it may not make logical sense to put the MP4 parser written in Rust right next to the CSS engine, for example. I believe that https://github.com/mozilla/gecko-dev https://github.com/mozilla/gecko-dev is a mirror of the repo in question, and so we can use Github's search function to find every file that it detects as being a Rust file: https://github.com/mozilla/gecko-dev/search?l=rust https://github.com/mozilla/gecko-dev/search?l=rust (which finds 3,274 Rust files, 6,701 C files, and 22,722 C++ files).
Manishearth 9y ago
- The mp4 metadata parser. This has been shipping for a while now, and was the first shipped Rust code. - The URL parser (rust-url). This is not shipping, because it's incomplete and there are some mismatches to deal with. But it exists. - Stylo: Servo's CSS engine in Firefox. By far the biggest one, this is shipping in beta and nightly, and should be there in the 57 release for everything but Android - webrender: Servo's GPU-focused renderer. Not shipping, can be flipped on in nightly. Still has work to be done - encoding-rs: All encoding operations go through this now. Shipping - The U2F stuff: A lot of the U2F code is in Rust. Shipping in nightly though I think it's still off by default (but that will change soon?) As far as the location of the code: The root rust crate is at https://hg.mozilla.org/mozilla-central/file/tip/toolkit/library/rust https://hg.mozilla.org/mozilla-central/file/tip/toolkit/libr... . Everything can be reached from it, and the cargo file that has all these links is https://hg.mozilla.org/mozilla-central/file/tip/toolkit/library/rust/shared/Cargo.toml https://hg.mozilla.org/mozilla-central/file/tip/toolkit/libr... - All of Servo is vendored in tree in https://hg.mozilla.org/mozilla-central/file/tip/servo https://hg.mozilla.org/mozilla-central/file/tip/servo . Not all of Servo is used, the majority of the used code is from https://hg.mozilla.org/mozilla-central/file/tip/servo/components/style https://hg.mozilla.org/mozilla-central/file/tip/servo/compon... - Webrender is vendored in tree in https://hg.mozilla.org/mozilla-central/file/tip/gfx/webrender https://hg.mozilla.org/mozilla-central/file/tip/gfx/webrende... - The U2F HID stuff is vendored at https://hg.mozilla.org/mozilla-central/file/tip/dom/webauthn/u2f-hid-rs https://hg.mozilla.org/mozilla-central/file/tip/dom/webauthn... - There's a bunch of stuff in libcubeb ; I don't even know what it's there for (https://hg.mozilla.org/mozilla-central/file/tip/media/libcubeb https://hg.mozilla.org/mozilla-central/file/tip/media/libcub...) - You can find "c api" rust crates scattered throughout, like mp4parse_capi, rust-url-capi, encoding_glue . These depend on the actual crate (usually, a crate that's published to crates.io) but expose an API that C can call into - Finally, any dependency from crates.io is vendored in https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust https://hg.mozilla.org/mozilla-central/file/tip/third_party/... . Note that this includes build time dependencies (so you'll find crates that deal with CLI parsing and terminal color info that aren't actually used by firefox). Despite the folder being labeled "third_party", a lot of that code is maintained by us, but in separate repos and published to crates.io. In particular, large chunks of Servo are reusable published crates.

coffee-- 9y ago

the FIDO U2F code is rust: http://searchfox.org/mozilla-central/source/dom/webauthn/u2f-hid-rs http://searchfox.org/mozilla-central/source/dom/webauthn/u2f... otherwise here's the list: http://searchfox.org/mozilla-central/search?q=&path=*.rs%24 http://searchfox.org/mozilla-central/search?q=&path=*.rs%24

Turing_Machine 9y ago
Thanks.

kenhwang 9y ago

Read about the first bit of Rust shipping here: https://hacks.mozilla.org/2016/07/shipping-rust-in-firefox/ https://hacks.mozilla.org/2016/07/shipping-rust-in-firefox/ And many of the Rust things that make FF56+ fast can be found here: https://wiki.mozilla.org/Quantum https://wiki.mozilla.org/Quantum

noncoml 9y ago
Great pointers, thanks. Do they also have any write-up on how did they find Rust during these changes? Was the back count lower than usual? Did the see an increase on productivity?
- 482794793792894 9y ago
  These components were built as part of the Servo project and then ported to Firefox, so you'd probably just want to ask the Servo team directly. You can find them on IRC, in the channel #servo on irc.mozilla.org. There is https://blog.servo.org/ https://blog.servo.org/, but it's mostly gradual updates on things, not a general overview.

kibwen 9y ago

I don't know if there's any one location for all the Rust code; it may not make logical sense to put the MP4 parser written in Rust right next to the CSS engine, for example. I believe that https://github.com/mozilla/gecko-dev https://github.com/mozilla/gecko-dev is a mirror of the repo in question, and so we can use Github's search function to find every file that it detects as being a Rust file: https://github.com/mozilla/gecko-dev/search?l=rust https://github.com/mozilla/gecko-dev/search?l=rust (which finds 3,274 Rust files, 6,701 C files, and 22,722 C++ files).

Manishearth 9y ago

- The mp4 metadata parser. This has been shipping for a while now, and was the first shipped Rust code. - The URL parser (rust-url). This is not shipping, because it's incomplete and there are some mismatches to deal with. But it exists. - Stylo: Servo's CSS engine in Firefox. By far the biggest one, this is shipping in beta and nightly, and should be there in the 57 release for everything but Android - webrender: Servo's GPU-focused renderer. Not shipping, can be flipped on in nightly. Still has work to be done - encoding-rs: All encoding operations go through this now. Shipping - The U2F stuff: A lot of the U2F code is in Rust. Shipping in nightly though I think it's still off by default (but that will change soon?) As far as the location of the code: The root rust crate is at https://hg.mozilla.org/mozilla-central/file/tip/toolkit/library/rust https://hg.mozilla.org/mozilla-central/file/tip/toolkit/libr... . Everything can be reached from it, and the cargo file that has all these links is https://hg.mozilla.org/mozilla-central/file/tip/toolkit/library/rust/shared/Cargo.toml https://hg.mozilla.org/mozilla-central/file/tip/toolkit/libr... - All of Servo is vendored in tree in https://hg.mozilla.org/mozilla-central/file/tip/servo https://hg.mozilla.org/mozilla-central/file/tip/servo . Not all of Servo is used, the majority of the used code is from https://hg.mozilla.org/mozilla-central/file/tip/servo/components/style https://hg.mozilla.org/mozilla-central/file/tip/servo/compon... - Webrender is vendored in tree in https://hg.mozilla.org/mozilla-central/file/tip/gfx/webrender https://hg.mozilla.org/mozilla-central/file/tip/gfx/webrende... - The U2F HID stuff is vendored at https://hg.mozilla.org/mozilla-central/file/tip/dom/webauthn/u2f-hid-rs https://hg.mozilla.org/mozilla-central/file/tip/dom/webauthn... - There's a bunch of stuff in libcubeb ; I don't even know what it's there for (https://hg.mozilla.org/mozilla-central/file/tip/media/libcubeb https://hg.mozilla.org/mozilla-central/file/tip/media/libcub...) - You can find "c api" rust crates scattered throughout, like mp4parse_capi, rust-url-capi, encoding_glue . These depend on the actual crate (usually, a crate that's published to crates.io) but expose an API that C can call into - Finally, any dependency from crates.io is vendored in https://hg.mozilla.org/mozilla-central/file/tip/third_party/rust https://hg.mozilla.org/mozilla-central/file/tip/third_party/... . Note that this includes build time dependencies (so you'll find crates that deal with CLI parsing and terminal color info that aren't actually used by firefox). Despite the folder being labeled "third_party", a lot of that code is maintained by us, but in separate repos and published to crates.io. In particular, large chunks of Servo are reusable published crates.