tsz
Shares rank 4 of 6 TypeScript compilers by recommenders
Fast TypeScript checker and compiler written in Rust, reported faster than tsgo, though critics say passing tests missed bugs.
Fast TypeScript checker and compiler written in Rust, reported faster than tsgo, though critics say passing tests missed bugs.
9 people gave an opinion
- recommend it
- 6
- criticize it
- 3
- approval share
- 67%
Recommended in 2 of 13 months
- November 2025: not recommended
- December 2025: not recommended
- January 2026: not recommended
- February 2026: not recommended
- March 2026: not recommended
- April 2026: not recommended
- May 2026: recommended
- June 2026: recommended
- July 2026: not recommended
- August 2026: not recommended
- September 2026: not recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 6 people recommend itNeeds 10 or more, not met.
- 2 recommenders for every criticNeeds 2 to 1 or better, met.
- Recommended in 2 of 13 monthsNeeds 4 or more, not met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Faster than tsgo in benchmarks
“With a different design I managed to make it faster than tsgo port.”
Comment from 5 May 2026 in “Bun is being ported from Zig to Rust” “It's already showing results that is nearly 3x faster than tsgo.”
Comment from 30 May 2026 in “Perry Compiles TypeScript directly to executables using SWC and LLVM” “Single file benchmarks are 3–5x faster than tsgo.”
Comment from 10 May 2026 in “Ask HN: What Are You Working On? (May 2026)” Praised as impressive, needed for TypeScript
“This is awesome. Typescript really needs more of this.”
Comment from 16 May 2026 in “Bun Rust rewrite: "codebase fails basic miri checks, allows for UB in safe rust"” “tsz looks impressive. Congrats!”
Comment from 16 May 2026 in “Bun Rust rewrite: "codebase fails basic miri checks, allows for UB in safe rust"”
Other TypeScript compilers people recommend
The four most recommended other TypeScript compilers, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| tsgo | 16 | 3 | 84% | 7 | — | Approved |
| Scriptc by Vercel | 12 | 21 | 36% | 2 | — | — |
| Perry TypeScript compiler | 11 | 15 | 42% | 4 | — | — |
| tszThis page | 6 | 3 | 67% | 2 | — | — |
| tsc-ts | 6 | 1 | 86% | 1 | — | — |
What people said
10 of the 13 comments that mention it, newest first. Each links to the original comment.
“It's already showing results that is nearly 3x faster than tsgo.”
“the commit history is the one maintainer and Claude pumping out like hundreds of commits 24 hours a day”
“tsz looks impressive. Congrats!”
“This is awesome. Typescript really needs more of this.”
“100% of tests pass yet I have a ton of bugs”
“Single file benchmarks are 3–5x faster than tsgo.”
“found it to be a deoptimisation”
“You'll get closer to Hegel ideals without making it impossible to write code”
“The fact that tsz can compile to wasm might actually give you an even more interesting feature”
“With a different design I managed to make it faster than tsgo port.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.