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Programming: Compiling Firefox, Mozilla's Rust, and Go/Python Adventures

Submitted by Roy Schestowitz on Wednesday 12th of September 2018 08:05:07 PM Filed under
Development
Moz/FF
  • Firefox is now built with clang LTO on all* platforms

    You might have read that Mozilla recently switched Windows builds to clang-cl. More recently, those Windows builds have seen both PGO and LTO enabled.

    As of next nightly (as of writing, obviously), all tier-1 platforms are now built with clang with LTO enabled. Yes, this means Linux, Mac and Android arm, aarch64 and x86. Linux builds also have PGO enabled.

    Mac and Android builds were already using clang, so the only difference is LTO being enabled, which brought some performance improvements.

  • Rust office hours

    ...I’m going to start an experiment that I call Rust office hours. The idea is simple: I’ve set aside a few slots per week to help people work through problems they are having learning or using Rust. My goal here is both to be of service but also to gain more insight into the kinds of things people have trouble with. No problem is too big or too small!

  • This Week in Rust 251

    Hello and welcome to another issue of This Week in Rust! Rust is a systems language pursuing the trifecta: safety, concurrency, and speed. This is a weekly summary of its progress and community.

  • Return to Limbo

    When the time came to pack up and return to Norway I considered whether I wanted to continue writing small examples in Go and porting some of my Python modules. It didn't feel all that comfortable or intuitive to write in Go, though I realise that it simply takes practice to gain familiarity. Despite this, it was worth taking some time to get an overview of the basics of Go for reasons that I'll get to later.

    [...]

    As mentioned earlier, I was interested in setting up Inferno on an old netbook – an Efika MX Smartbook – and had already experimented with running the system in its hosted form on top of Debian GNU/Linux. Running hosted Inferno is a nice way to get some experience using the system and seems to be the main way it is used these days. Running the system natively requires porting it to the specific hardware in use, and I knew that I could use the existing code for U-Boot, FreeBSD and Linux as a reference at the very least. So, the task would be to take hardware-specific code for the i.MX51 platform and adapt it to use the conventions of the Inferno porting layer. Building from the ground up, there are a few ports of Inferno to other ARM devices that could be used as foundations for a new port.

»

Firefox Is Now Built With Clang+LTO Everywhere

Submitted by Roy Schestowitz on Wednesday 12th of September 2018 08:30:35 PM.
  • Firefox Is Now Built With Clang+LTO Everywhere, Sizable Performance Wins For Linux

    Firefox nightly builds are now built with the LLVM Clang compiler on all major platforms and the Linux build in particular is also now utilizing PGO optimizations too. Faster Firefox is coming thanks to this compiler work.

    All of Mozilla's tier-one platforms are now building the newest Firefox browser code under the Clang compiler and having LTO (Link Time Optimizations) enabled. That includes Linux, Mac, Android, Windows across ARM / AArch64 / x86 relying upon this open-source compiler. For now only the Linux builds also have PGO (Profile Guided Optimizations) enabled.

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