00:55 <KevinPFleming[m]> yow... Rust 1.87 shrank the binary size rather significantly for my project

00:56 <KevinPFleming[m]> .text section shrank from 14,820 bytes to 12,870

00:58 <Amit[m]> Kevin P. Fleming: what was your previous version?

00:59 <KevinPFleming[m]> 1.86.0, I have stable in rust-toolchain.toml

01:02 <Amit[m]> (I'm seeing that the older nightly we'd been using is marked rustc 1.87.0-nightly so likely already included code size optimizations, e.g. newer LLVM or something. No change for me.)

01:02 <JamesMunns[m]> 1.87 switched to llvm20 iirc

01:04 <Amit[m]> Those of you/us using RISC-V, expect even more dramatic improvements over the next while. RISC-V size optimizations in LLVM at the moment are still fairly atrocious, but it's actively being worked on and there's no magic needed. Just elbow grease from the right interested people, which seems to be happening.

01:07 <Amit[m]> Kevin P. Fleming: it's something I really enjoy about working within such an active ecosystem/community. Things that sucked a while ago are all of sudden good with no effort on my part! Like when we used to buy a new CPU and all of a sudden my embarrassingly slow code was 1/2 as slow :)

09:17 <thejpster[m]> https://github.com/rust-lang/rust/releases/tag/1.87.0... (full message at <https://catircservices.org/_irc/v1/media/download/ATrQhzf7gEZEQIgQAjUAEeJVDJuCNYGW3ubXcX9d1yQeb-NhFNHHVEt3OgbxfnqPJIvwYkMVf_CNmb2F42shtwq_8AAAAAAAAGNhdGlyY3NlcnZpY2VzLm9yZy9mTUFtYmhYU3ViQkFjc0tlVGpoQUJxaHo>)

14:41 <Kaspar[m]> <KevinPFleming[m]> ".text section shrank from 14,8..." <- yeah, we're also seeing 5-10% code size reduction in the Ariel examples. Nice!

14:44 <chrysn[m]> I'd have to double-check, but I think this is also why when I recently rebuilt a program that shouldn't take 40 seconds to build, it was way faster today. (Could be bad measurements too, though.)

15:32 <jason-kairos[m]> do floating point types in rust have a well-know / fixed representation regardless of hardware?

15:33 <jason-kairos[m]> * do floating point types in rust have a well-known / fixed binary representation regardless of hardware?

15:34 <GrantM11235[m]> Yes

15:34 <GrantM11235[m]> >A 32-bit floating-point type (specifically, the “binary32” type defined in IEEE 754-2008).

15:34 <GrantM11235[m]> https://doc.rust-lang.org/core/primitive.f32.html

15:42 <jason-kairos[m]> do those binary size improvements only apply to riscv or do they apply to arm cortex as well?

16:41 <KevinPFleming[m]> I'm using Cortex-M0.

17:58 <i509vcb[m]> I think ARM is trying their hand at "how confusing can naming become": https://newsroom.arm.com/news/new-arm-product-naming-architecture

18:17 <thejpster[m]> Unclear if the new names are only for Compute Subsystems, or for the processors too.

18:18 <thejpster[m]> Or how we do a crate that works across named platforms when the underlying technology is the same, it’s just segmented by market.

18:18 <thejpster[m]> Lots of questions. Wait and see I guess.

19:33 <LeandroMarceddu[> Oh so it can get worse..