NUnutjob2·Apr 28, 2026
Much more interesting is Mir: https://github.com/vnmakarov/mir
It has all the tools for custom JIT including a nice C compiler.
In CJIT: C, Just in Timevnmakarov
mir
C2020–2026
vnmakarov / mir
mir
A lightweight JIT compiler based on MIR (Medium Internal Representation) and C11 JIT compiler and interpreter based on MIR
22Distinct people
22Mentions
0Explicit recommenders
2.7KGitHub stars
What to know before exploring
What it is
A lightweight JIT compiler based on MIR (Medium Internal Representation) and C11 JIT compiler and interpreter based on MIR
GitHub
Where it is used
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What people are saying
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year22 dated mentions
Observed mentions: 2020-01-20 14:37:31 UTC to 2026-04-28 21:52:08 UTC.
* An incomplete calendar period is marked with an outlined bar. Its count is not directly comparable with a full period.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 5 | 1 | 4 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 5 | 1 | 4 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 4 | 1 | 3 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 4 | 1 | 3 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 2 | 1 | 1 |
| 2026 (partial) | 2026-01-01 00:00:00 UTC | 2027-01-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
22 sourcesWirth’s Law still hits hard in 2025. It's like the ghost of your first CS prof whispering "I told you so" every time an app eats 500MB to display a list of items.
We were supposed to use better tools to build better systems. Instead, we used faster hardware to make it acceptable to ship ever-more bloated layers of abstraction. Everything depends on everything else, and no one knows what any of it does, just that it “works on my machine.” Until it doesn't.
It’s not just about performance — it’s about comprehensibility. You used to be able to hold a system in your head. Now? Good luck tracing anything across 8 layers of indirection, six config files, a microservice mesh and a runtime whose lifecycle even the maintainers don’t fully understand.
I find myself drawn to projects like Red[1], MIR[2], or even Metamath[3] — not because they’re pro
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duction-ready silver bullets, but because they remind me what it’s like to work on systems that are conceptually finite. With MIR, you get a JIT compiler backend that’s tiny and knowable — and that still punches way above its weight. There’s elegance in understanding where every byte and cycle goes.
The rebound effect of Moore’s Law is real: more resources led to more indirection, which led to more tools, which led to more churn. And now we’re entering the AI era, where tools can generate “working” code faster than we can understand what it’s really doing.
And sure, it feels productive — but something subtle gets lost when we stop thinking through the system as a whole.
We’ve outsourced understanding to the machine.
Now we just hope it’s right.
[1] https://www.red-lang.org/
[2] https://github.com/vnmakarov/mir
[3] https://us.metamath.org/
Mir: A lightweight JIT compiler based on MIR (Medium Internal Representation)
1 points · Open discussionhttps://github.com/vnmakarov/mir is also great for this, the c2m binary is an optimizing C11 JIT runner, even accept "*.c" as input.
In A tiny self-remaking C programMir (lightweight JIT) version 1.0.0
7 points · Open discussionSee also https://github.com/vnmakarov/mir
In QBE – Compiler Back EndMIR comes from the Rubyverse and isn't related to LLVM MLIR.
https://github.com/vnmakarov/mir?tab=readme-ov-file#mir
In Ravi is a dialect of Lua, with JIT and AOT compilersMir: Strongly typed IR to implement fast and lightweight interpreters and JITs
115 points · Open discussionI came here to say exactly the same thing. There are also a couple of other options: the MIR project from RedHat [1], libjit [2], lightning [3] and Dynasm [4]
1. https://github.com/vnmakarov/mir
2. https://www.gnu.org/software/libjit/
3. https://www.gnu.org/software/lightning/manual/lightning.html
4. https://corsix.github.io/dynasm-doc/tutorial.html
But in general it seems to be very hard to beat the bang for buck from generating C and compiling that - even with something simple like tcc
In Implementing Interactive LanguagesAuthor is Vladimir Makarov creator of MIR: "a universal lightweight Just-in-Time (JIT) compiler known as MIR. The cornerstone of the project is a machine-independent medium-level intermediate representation (MIR)."
https://github.com/vnmakarov/mir
https://en.wikipedia.org/wiki/Intermediate_representation
In How I developed a faster Ruby interpreter (2022)You should check https://github.com/vnmakarov/mir
In Ask HN: Recommendation for general purpose JIT compilerMore great things:
- https://c9x.me/compile/
- https://github.com/vnmakarov/mir
In How to learn compilers: LLVM Edition> I wish C was scriptable
C kinda can be used as scripting language with MIR project https://github.com/vnmakarov/mir
It released version 0.1 just a few days ago, and I've successfully used it as an alternative and fast C compiler with Nelua.
In Nelua Programming LanguageThe first release of MIR project
1 points · Open discussionShowing the 15 most recent of 22 sources. Enable JavaScript to search and browse every indexed mention.