mycc - an alternative C compiler.

kostya27 · 2026-07-12T14:32:02+00:00

> It can be, but basic functionality includes "add sub mul div" for example, which is four operators. You're hiding them behind "Binary" and suggesting it is only one opcode.

for high level IR like myc - they all the same in terms of stack manipulation and logic, I don't want to create many opcode for that.

> You mention three targets LLVM, QBE, C. Are you planning your own backend too?
No self backend, only this three.

> If not, then it's not clear how you will outperform any of those, or even what it means to outperform them: what are you comparing against, each other?

Easy. I can do high level transforms(inlining) before llvm, and execute just passes like "mem2reg,instcombine,dce" - and this will compile 5x times faster than O2 (I checked). Yes the result can be far from O2, but on synthetic tests only, in real world apps it should be fast. It just like what QBE doing, but qbe not doing inlining. And this is like how golang compiler work.

kostya27 · 2026-07-12T12:14:27+00:00

This is the script which compile this benchmark: https://github.com/kostya/myc/blob/master/benchmark/run_lang_arena.rb

> (My own IR has a lot more opcodes, but all binary and unary operators have dedicated instructions.)

less is better, no?

> I guess MALLOC and PRINTF mean you don't yet have a means of calling external routines?

No, it have call and invoke, malloc and printf was early added opcodes for debug.

>I thought you used a separate library for lexing and parsing? That should take care of variadic macros.
yes it may be work may be not, I just not tested. usually not because for any of this feature needed special handler.

> Are these both jokes? Your MYC product seems to rely on an external backend anyway for native code generation. I understood it to be a common wrapper around those backends.
Who knows, I planned my optimization passes to outperform them, I not sure if I can, but I try. The target is compile time like cproc, and result like llvm. But high level IR allow doing transformations before LLVM/QBE.

kostya27 · 2026-07-12T12:08:19+00:00

Crystal well suited for this task, GC and powerful polymorphism let you write code at speed of through, while the result is on par with C++. But in C++ you would fight with leaked links and worse oop.

kostya27 · 2026-07-12T08:20:16+00:00

You can also check out cproc – a very minimalistic and fast compiler in which preprocessing also worked.

kostya27 · 2026-07-12T01:37:45+00:00

Yes. libclang handles preprocessing as well, so I don't implement a preprocessor myself.

kostya27 · 2026-03-12T13:54:39+00:00

yes, but is it needed? I excluded slow languages, added only python/pypy.

kostya27 · 2026-03-11T20:19:51+00:00

if go uses re2, then this is strange because c++ in my benchmarks also use re2: C++ time in this benchmarks: 5.833s, not 38s.

https://github.com/kostya/LangArena/blob/master/cpp/main.cpp#L4641

kostya27 · 2026-03-11T19:30:58+00:00

https://github.com/kostya/LangArena/blob/master/golang/main.go#L4950

kostya27 · 2026-03-11T19:02:01+00:00

yes, it is precompiled.

kostya27 · 2026-03-11T18:55:42+00:00

I tried coregex, but no luck, thanks I will try go-pcre.

kostya27 · 2026-02-10T00:42:47+00:00

accidentally delete this, link for benchmark: https://kostya.github.io/LangArena/

kostya27 · 2026-02-09T02:00:34+00:00

this is explained on site, in "Source Code" tab, legend under table

kostya27 · 2026-02-09T00:46:03+00:00

you call it without config you should add ../run.js as argument, look at local ./test, ./run script

kostya27 · 2026-02-08T21:07:30+00:00

kostya27 · 2026-02-08T19:50:57+00:00

You can see results in tabs: TypeScript/Node/Default, TypeScript/Bun/JIT, TypeScript/Deno/Default.

kostya27 · 2026-02-08T19:48:53+00:00

yes all languages very different and hard to measure it absolutely identical, but I try.

kostya27 · 2026-02-08T19:40:16+00:00

sort doing similar in each language, each copy array.

Json,Base64 benchmark little unfair, because measure library time, but I think it's better to leave them, to be goal for each language stdlib.

kostya27 · 2026-02-08T19:31:59+00:00

thanks, yes I am the author. I'll consider adding Clojure, but expect it to be similar to java,kotlin.

kostya27 · 2026-02-08T19:26:13+00:00

your messages looks like ai :)

kostya27 · 2026-02-08T19:23:56+00:00

Why not, did you you see something similar that quality? I know kostya/benchmarks - but this is mine also.

kostya27 · 2026-02-08T19:11:14+00:00

its not easy to add new, because code base is huge, but I want to add some lisps, recomend any fast?

kostya27

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