YHacker Newsscreenshots

Screenshot of github.com: C# now beats Rust on WASM size

First screen, captured 5 days ago.

C# now beats Rust on WASM size

More from github.com →

GitHub repository for NetWasm, a tool that compiles C# and .NET CIL to small standalone WebAssembly with WASI, using AOT compilation with a built-in runtime and precise GC.

What HN thinks

A headline about kilobytes turns into a referendum on C#'s soul, with a side of Claude-phrase spotting.

The comparison is unfair
The C# output was post-processed with Binaryen and the toolchain tuned for size, while the Rust build skipped well-known size tricks that can shrink it much further.
C# is a great backend language
Many praise modern C# tooling, debugging and features, though critics cite missing associated types, weak numerics libraries, a large surface area and Microsoft distrust.
Real value is fixing Blazor bloat
Defenders say the point is not beating Rust but avoiding Blazor WASM's 10MB+ bundles; others question WASM's usefulness and note the toolchain isn't open source.

Consensus: Most agree the 'beats Rust' headline is overstated since Rust can go much smaller, though the size work is still seen as cool.

Recommended in the comments

min-sized-rust ↗ (other): Shows how far Rust binaries can shrink beyond the article's settings.
ZLinq ↗ (library): Offers LINQ without heap allocations for performance-sensitive code.
wasm-bindgen ↗ (tool): Praised for making Rust-to-WASM compilation smooth.
Math.NET Numerics ↗ (library): Cited as evidence C# has usable numerics libraries, though others found it limited.
System.Threading.Channels (library): Simplifies fan-out/fan-in concurrency without manual synchronization.
F# (tool): Suggested as a better-designed .NET language with C# interop.

Summarised by Claude from the comment thread 3 days ago.

Points: 131
Comments: 108
Posted: 2026-10-21 by sumnole
Category: Programming

webassembly csharp dotnet wasi aot-compilation compiler

All captures:

Looks similar

Screenshot of github.com: Show HN: Procinsh – A 3D Linux process inspector

Show HN: Procinsh – A 3D Linux process inspector (github.com)

39 points by a_kawashiro 19 days ago | 8 comments

GitHub repository for ProcInSh, a web-based 3D process inspector for Linux.

linux process-inspector rust 3d-visualization

Screenshot of github.com: Show HN: Winpodx – run Windows apps on Linux as native windows

Show HN: Winpodx – run Windows apps on Linux as native windows (github.com)

73 points by kernalix7 5 months ago | 37 comments

Screenshot of github.com: Neorg – organize your life in Neovim

Neorg – organize your life in Neovim (github.com)

78 points by Brajeshwar 2 years ago | 30 comments

Screenshot of github.com: Aeron: Efficient reliable UDP unicast, UDP multicast, and IPC message transport

Aeron: Efficient reliable UDP unicast, UDP multicast, and IPC message transport (github.com)

69 points by todsacerdoti 1 year ago | 32 comments

Screenshot of github.com: Deletes all instances of Microsoft's GDID and prevents minting of new ones

Deletes all instances of Microsoft's GDID and prevents minting of new ones (github.com)

48 points by campuscodi 2 months ago | 29 comments

Screenshot of github.com: jj: a Git-compatible VCS that is both simple and powerful

jj: a Git-compatible VCS that is both simple and powerful (github.com)

146 points by tambourine_man 1 year ago | 95 comments

Related stories

Screenshot of bd103.dev: C for Rust programmers

C for Rust programmers (bd103.dev)

154 points by xyproto 18 days ago | 161 comments

A blog post by a programmer who learned Rust first, listing surprising details and quirks of C for Rust programmers learning the language.

c rust systems-programming language-quirks

Screenshot of github.com: WhenFS: Calender Is Now a File System

WhenFS: Calender Is Now a File System (github.com)

327 points by 3ul3r 2 years ago | 71 comments

GitHub repository for WhenFS, a Rust FUSE filesystem that stores files in your Google Calendar.

fuse google-calendar filesystem rust

Screenshot of github.com: Woxi: Wolfram Mathematica Reimplementation in Rust

Woxi: Wolfram Mathematica Reimplementation in Rust (github.com)

318 points by adamnemecek 8 months ago | 128 comments

GitHub repository for Woxi, an open-source reimplementation of the Wolfram Language / Mathematica written in Rust, licensed AGPL-3.0.

rust wolfram-language mathematica computer-algebra-system

Screenshot of github.com: Rust has been forked to the Crab Language

Rust has been forked to the Crab Language (github.com)

449 points by max_ 3 years ago | 459 comments

GitHub repository for CrabLang, a community fork of the Rust programming language created in response to Rust Foundation trademark policy concerns.

rust crablang fork programming-languages

Screenshot of collabora.com: Matt Godbolt sold me on Rust by showing me C++

Matt Godbolt sold me on Rust by showing me C++(collabora.com)

565 points by LorenDB 1 year ago | 532 comments

Collabora blog post by Gustavo Noronha explaining how Matt Godbolt's talk on C++ pitfalls convinced him of Rust's advantages for correct API design.

rust c-plus-plus matt-godbolt type-safety

Screenshot of notgull.net: Writing a Rust compiler in C

Writing a Rust compiler in C (notgull.net)

361 points by todsacerdoti 2 years ago | 186 comments

Blog post by John Nunley announcing Dozer, a Rust compiler written in C, and explaining why he is building it to bootstrap Rust.

rust c compilers bootstrapping