rust-lang/rust on Hacker News

…at https://en.wikipedia.org/wiki/Python_License . Similarly, the reference Rust implementation ( https://github.com/rust-lang/rust ) is licensed under Apache 2.0 and MIT licenses. In what sense is FOSS software a kind of non-FOSS software?

comment by zahlman · 2025-06-26 · in Memory safety is table stakes

Even 'git status' gets slow on large repositories (or slow hosts). git status takes 643ms for github.com/rust-lang/rust

comment by WhyNotHugo · 2025-06-24 · in Starship: A minimal, fast, and customizable prompt for any shell

…in a well-designed way, or removed -- the current status is very unsatisfying and prone to bugs." https://github.com/rust-lang/rust/issues/48055#issuecomment-...

comment by kibwen · 2025-06-13 · in Rust compiler performance

…development might have otherwise dictated. FWIW while it was a factor it was just one of a number: https://github.com/rust-lang/rust/issues/36963#issuecomment-... And jemalloc was only removed two years after that issue was opened:…

comment by masklinn · 2025-06-13 · in Jemalloc Postmortem

OK, parser then: https://github.com/rust-lang/rust/tree/1.87.0/compiler/rustc... (main logic seems to be in expr.rs) vs https://github.com/ziglang/zig/blob/0.14.1/lib/std/zig/Parse... Again, for those who wish to form their own opinions.

comment by AndyKelley · 2025-06-12 · in Rust compiler performance

…in both Go and Rust: [Go] https://github.com/golang/go/blob/f18d046568496dd331657df4ba... [Rust] https://github.com/rust-lang/rust/blob/40daf23eeb711dadf140b... While Go leans on the enum value produced by `range` to act as the language's…

comment by 9rx · 2025-06-10 · in Go is a good fit for agents

…support for infinite loops without guaranteed forward progress, allowing this to be fixed: https://github.com/rust-lang/rust/issues/28728

comment by kibwen · 2025-06-07 · in Low-Level Optimization with Zig

…v.Close()`? In almost all cases, `close(2)` errors can be safely ignored. Rust also does this: https://github.com/rust-lang/rust/blob/792fc2b033aea7ea7b766...

comment by database64128 · 2025-06-04 · in (On | No) Syntactic Support for Error Handling

…hours ago. The entire error message was literally "operation not supported on this platform". Yeay. https://github.com/rust-lang/rust/issues/141854 > I'll also note that this was quite annoying to debug since the error message in its…

comment by timhh · 2025-06-01 · in Why Use Structured Errors in Rust Applications?

It’s coming soonish! There’s an accepted RFC that’s getting close to being ready to stabilize https://github.com/rust-lang/rust/issues/132162

comment by steveklabnik · 2025-05-31 · in C++ to Rust Phrasebook

…very descriptive of what this does since the operations themselves are algebraic. Also this comment https://github.com/rust-lang/rust/issues/136469#issuecomment... > > On that note I added an unresolved question for naming since algebraic…

comment by nextaccountic · 2025-05-31 · in Beware of Fast-Math

I helped design an API for "algebraic operations" in Rust: < https://github.com/rust-lang/rust/issues/136469 >, which are coming along nicely. These operations are 1. Localized, not a function-wide or program-wide flag. 2. Completely safe,…

comment by orlp · 2025-05-31 · in Beware of Fast-Math

…use unsafe Yes it does, it uses 'stdout.write_all', which ultimately uses unsafe to call libc.write https://github.com/rust-lang/rust/blob/d76fe154029e03aeb64af... The "unsafe" in uutils is just better hidden. I personally like my…

comment by TheDong · 2025-05-27 · in Yes-rs: A fast, memory-safe rewrite of the classic Unix yes command

…trick ? Edit: If I had read the next paragraph, I'd have learn about [1] before commenting [1] https://github.com/rust-lang/rust/issues/140167

comment by smallpipe · 2025-05-22 · in Improving performance of rav1d video decoder

The associated issue for comparing two u16s is interesting. https://github.com/rust-lang/rust/issues/140167

comment by mmastrac · 2025-05-22 · in Improving performance of rav1d video decoder

…loop, can quickly balloon from O(N) to O(scary). https://github.com/PSeitz/lz4_flex/issues/147 https://github.com/rust-lang/rust/issues/117545 If I'm reading that log-log plot right, that looks like a significantly worse than 100x slowdown…

comment by MaulingMonkey · 2025-05-21 · in Writing into Uninitialized Buffers in Rust

…the bug in question, it has been quite "popular" for about 5 years now, and is actively tracked : https://github.com/rust-lang/rust/issues/110338 . Nothing really weird. Just async hitting the limits of the current rust design.

comment by bsaul · 2025-05-16 · in Java at 30: Interview with James Gosling

i didn't "find" it. As i said, it's a well known one : https://github.com/rust-lang/rust/issues/110338 Simply using axum with code using multiple layers of async was enough. But then again, it looked like this bug (the error message is the…

comment by bsaul · 2025-05-16 · in Java at 30: Interview with James Gosling

…how useful those were. EDIT: okay, so I'm doing some digging: error codes were added before 1.0... https://github.com/rust-lang/rust/commit/0e80dbe59ea986ea53c... > This implements the minimal scaffolding that allows mapping diagnostic…

comment by steveklabnik · 2025-05-16 · in Evolution of Rust Compiler Errors

…under -used in Rust, not overused. If that does become a problem, there are also techniques like https://github.com/rust-lang/rust/issues/68262 too.

comment by steveklabnik · 2025-05-10 · in Rust’s dependencies are starting to worry me

…https://github.com/geiger-rs/cargo-geiger . The Rust compiler has some unsoundness issues such as https://github.com/rust-lang/rust/issues/84366 . Those would need fixing or linter coverage.

comment by mleonhard · 2025-05-10 · in Rust’s dependencies are starting to worry me

Rust had something similar: https://github.com/rust-lang/rust/issues/13871

comment by kevinmgranger · 2025-05-02 · in Don't watermark your legal PDFs with purple dragons in suits

…s.rust-lang.org/t/expose-llvms-or-disjoint-i... - https://github.com/rust-lang/libs-team/issues/373 - https://github.com/rust-lang/rust/pull/124601 Which ultimately culminated in an opinion that should sound familiar -…

comment by alion02 · 2025-04-30 · in Performance optimization is hard because it's fundamentally a brute-force task

https://github.com/rust-lang/rust/issues/28728

comment by gavinhoward · 2025-04-26 · in Exploiting Undefined Behavior in C/C++ Programs: The Performance Impact [pdf]

…and needs to be qualified. You probably noticed, but it should become a thing in RFC 3591: https://github.com/rust-lang/rust/issues/134691 So it does kind of work on current nightly: #![feature(import_trait_associated_functions)] use…

comment by higherhalf · 2025-04-21 · in Pipelining might be my favorite programming language feature

…in the README seems to be outdated, there's more up-to-date progress on reproducible rustc at https://github.com/rust-lang/rust/issues/129080

comment by csense · 2025-04-20 · in Bootstrapping Rustc from Source

…blog post to compare modern typestate patterns to the historical built-in typestate mechanism. https://github.com/rust-lang/rust/issues/2178

comment by zokier · 2025-04-20 · in Pretty State Machine Patterns in Rust (2016)

…append .patch or .diff to any PR or commit URL, and you'll get back a git-formatted patch or diff. https://github.com/rust-lang/rust/pull/139966 https://github.com/rust-lang/rust/pull/139966.patch https://github.com/rust-lang/rust/pull/1399…

comment by tomjakubowski · 2025-04-18 · in Shell-secrets – GPG-encrypted environment variables

…is immediate: ```rs fn main() { loop {} } ``` I think this can even cause Undefined Behavior :) https://github.com/rust-lang/rust/issues/28728

comment by LoganDark · 2025-04-16 · in How to Optimize Rust for Slowness: Inspired by New Turing Machine Results

…to the world should have been used instead. Very very old Rust had "crate files" which were this https://github.com/rust-lang/rust/blob/a8eeec1dbd7e06bc811e5... .rc standing for "rust crate" There's pros and cons here. I'm of two minds.

comment by steveklabnik · 2025-04-15 · in Two Years of Rust

…is how you signal to the compiler that “atomically writing two values at once” might happen). https://github.com/rust-lang/rust/pull/68491

comment by Georgelemental · 2025-04-10 · in A surprising enum size optimization in the Rust compiler

Many years ago I think, here: https://github.com/rust-lang/rust/issues/46213 . (Found this via https://lobste.rs/s/w3jjb2/surprising_enum_size_optimization... )

comment by returningfory2 · 2025-04-10 · in A surprising enum size optimization in the Rust compiler

…So if it's always equal to cfg!(target_feature="v"), then what does that even mean? I have created https://github.com/rust-lang/rust/issues/139139

comment by thomashabets2 · 2025-03-30 · in Towards fearless SIMD, 7 years later

…clock is monotonic? [1] [0]: https://github.com/microsoft/TypeScript/wiki/Breaking-Change... [1]: https://github.com/rust-lang/rust/blob/e2223c94bf433fc38234d...

comment by xlii · 2025-03-28 · in Coordinating the Superbowl's visual fidelity with Elixir

Trait upcasting will land in Rust 1.86.0 which will be released in one week: https://github.com/rust-lang/rust/pull/134367

comment by tyilo · 2025-03-27 · in Exploring Dynamic Dispatch in Rust (2017)

…looks like the Rust standard library migrated away from SRWLOCK on account of this issue [0]. [0] https://github.com/rust-lang/rust/issues/121949

comment by LegionMammal978 · 2025-03-23 · in The case of the critical section that let multiple threads enter a block of code

…issue is a different, but related tracking issue. The FP-in-const tracking issue was this one: https://github.com/rust-lang/rust/issues/57241

comment by kibwen · 2025-03-23 · in Crabtime: Zig’s Comptime in Rust

…Looks like floating point math in const fn is coming. Here is the respective tracking issue: https://github.com/rust-lang/rust/issues/128288

comment by weinzierl · 2025-03-22 · in Crabtime: Zig’s Comptime in Rust

A long-standing issue with that was just recently fixed: https://github.com/rust-lang/rust/pull/133250

comment by ofek · 2025-03-17 · in Zlib-rs is faster than C

…would probably be faster thanks to the standard library sort being the fastest, across languages ( https://github.com/rust-lang/rust/pull/124032 ). Again, faster than C. Happy to give more examples if you’re interested. There’s nothing…

comment by nindalf · 2025-03-16 · in Zlib-rs is faster than C

…library has a state of the art sort implementation. There’s nothing faster, in any language - https://github.com/rust-lang/rust/pull/124032 . And sure, it’s possible that someone could write a C program that compares in speed to all the…

comment by nindalf · 2025-03-13 · in I stopped everything and started writing C again

…to work with just minified stack traces and not set up source maps to make them readable. [1]: https://github.com/rust-lang/rust/issues/99301

comment by the_mitsuhiko · 2025-03-10 · in Stack Traces Are Underrated

…code in Rust worse than C++ almost. A fully left-to-right syntax would be amazing. EDIT: found https://github.com/rust-lang/rust/issues/10011 and https://github.com/rust-lang/rfcs/pull/3577

comment by dcsommer · 2025-03-08 · in Zig's dot star syntax (value.*)

…out to an external assembler, I suppose. [1]: https://github.com/rust-lang/reference/pull/1689 [2]: https://github.com/rust-lang/rust/pull/134213

comment by jchw · 2025-03-08 · in Rust inadequate for text compression codecs?

Box::leak was added two years later in November 2017 https://github.com/rust-lang/rust/commit/360ce780fdae0dcb31c... >Crashes, stability, and performance issues are still not safety issues since there’s so many ways to cause those beyond…

comment by milesrout · 2025-03-03 · in Effective Rust (2024)

…perhaps because it requires a network transaction, it's very easy to introduce race conditions. [1] https://github.com/rust-lang/rust/issues/117485

comment by Animats · 2025-03-02 · in Effective Rust (2024)

The rust cygwin target has been merged (in a different attempt): https://github.com/rust-lang/rust/pull/134999

comment by faho · 2025-02-27 · in Fish 4

…There have been discussions about adding the target to Rust, but they have not been pursued: https://github.com/rust-lang/rust/issues/79854 https://github.com/rust-lang/rust/issues/5526

comment by pbronez · 2025-02-27 · in Fish 4

…Maybe it was Go? EDIT: Found it: 'rust-lang/rust#13871: "hello world" contains Lovecraft quotes' https://github.com/rust-lang/rust/issues/13871

comment by runlevel1 · 2025-02-20 · in 1972 Unix V2 "Beta" Resurrected

modules are meant to be the boundary for a safe abstraction, but sometimes you get fun holes like https://github.com/rust-lang/rust/issues/128872 where you can implement Copy for a type in a different module in the same crate, even if the…

comment by kobebrookskC3 · 2025-02-16 · in Solving the ABA Problem in Rust with Tagged Pointers