qbe-rs VS Som

Compare qbe-rs vs Som and see what are their differences.


QBE IR in natural Rust data structures (by garritfra)


Parser, code model, navigable browser and VM for the SOM Smalltalk dialect (by rochus-keller)
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qbe-rs Som
23 7
45 19
- -
4.6 0.0
5 months ago 10 months ago
Rust C++
GNU General Public License v3.0 or later GNU General Public License v3.0 only
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of qbe-rs. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-05-09.


Posts with mentions or reviews of Som. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-05-27.
  • Do transpilers just use a lot of string manipulation and concatenation to output the target language?
    4 projects | reddit.com/r/ProgrammingLanguages | 27 May 2023
  • Ask HN: Admittedly Useless Side Projects?
    21 projects | news.ycombinator.com | 24 Jun 2022
    - https://github.com/rochus-keller/Smalltalk/ Parser, code model, interpreter and navigable browser for the original Xerox Smalltalk-80 v2 sources and virtual image file

    - https://github.com/rochus-keller/Som/ Parser, code model, navigable browser and VM for the SOM Smalltalk dialect

    - https://github.com/rochus-keller/Simula A Simula 67 parser written in C++ and Qt

    > do you regret those endeavours?

    No, not in any way; the projects were very entertaining and gave me interesting insights.

  • Ask HN: Recommendation for general purpose JIT compiler
    12 projects | news.ycombinator.com | 15 May 2022
    If your DSL is statically typed then I recommend that you have a look at the Mono CLR; it's compatible with the ECMA-335 standard and the IR (CIL) is well documented, even with secondary literature.

    If your DSL is dynamically typed I recommend LuaJIT; the bytecode is lean and documented (not as good as CIL though). LuaJIT also works well with statically typed languages, but Mono is faster in the latter case. Even if it was originally built for Lua any compiler can generate LuaJIT bytecode.

    Both approaches are lean (Mono about 8 MB, LuaJIT about 1 MB), general purpose, available on many platforms and work well (see e.g. https://github.com/rochus-keller/Oberon/ and https://github.com/rochus-keller/Som/).

  • When is Smalltalk's speed an issue?
    2 projects | reddit.com/r/smalltalk | 21 Feb 2022
    At the latest when you run a benchmark suite like Are-we-fast-yet; here are some measurment results: http://software.rochus-keller.info/are-we-fast-yet_crystal_lua_node_som_pharo_i386_results_2020-12-29.pdf. See also https://github.com/rochus-keller/Som/ and https://github.com/rochus-keller/Smalltalk.
  • LuaJIT for backend?
    6 projects | reddit.com/r/ProgrammingLanguages | 2 Jan 2022
    LuaJIT is well suited as a backend/runtime environment for custom languages; I did it several times (see e.g. https://github.com/rochus-keller/Smalltalk, https://github.com/rochus-keller/Som/, https://github.com/rochus-keller/Oberon/). I also implemented a bit of infrastructure to ease the reuse: https://github.com/rochus-keller/LjTools. LuaJIT has some limitations though; if you require closures you have to know that the corresponding LuaJIT FNEW bytecode is not yet supported by the JIT, i.e. switches to the interpreter; as a work-around I implemented my own closures; LuaJIT also doesn't support multi-threading, but co-routines; and there is no debugger, and the infrastructure to implement one has limitations (i.e. performance is low when running to breakpoints). For most of my projects this was no issue. Recently I switched to CIL/Mono for my Oberon+ implementation which was a good move. But still I consider LuaJIT a good choice if you can cope with the mentioned limitations. The major advantage of LuaJIT is the small footprint and impressive performance for dynamic languages.
  • Optimizing an old interpreted language: where to begin?
    3 projects | reddit.com/r/Compilers | 4 May 2021
    One option is to leverage someone else's JIT: you could, for example, rewrite the interpreter to transpile to Lua source, which is then run in LuaJIT. There's a Smalltalk dialect which does this successfully; the Lua version runs in 1/12th the time of the C interpreted version. https://github.com/rochus-keller/Som You can use LuaJIT's FFI to call back into the Stunt server, or else just rewrite it completely in Lua --- large parts of the Stunt server will just go away in a native Lua implementation (e.g. the object database is just a table). Javascript would be another candidate for this.
  • JITted lang which is faster than C?
    6 projects | reddit.com/r/ProgrammingLanguages | 12 Feb 2021
    This is a completely different kind of measurement; unfortunately this is not clear enough from my Readme. I wanted to find out, how well my naive Bluebook interpreter performs on LuaJIT (using my virtual meta tracing approach) compared to Cog, which is a dedicatd Smalltalk VM optimized with whatever genious approaches over two decades (or even longer considering the long experience record by Elliot). This experiment continues in https://github.com/rochus-keller/Som, because I didn't want to modify the original Smalltalk image. I found that my naive LuaJIT based approach is about factor seven behind the highly optimized Cog/Spur, and further improvements would require similar optimization tricks as in the latter.

What are some alternatives?

When comparing qbe-rs and Som you can also consider the following projects:

minivm - A VM That is Dynamic and Fast

ubpf - Userspace eBPF VM

Oberon - Oberon parser, code model & browser, compiler and IDE with debugger

Smalltalk - Parser, code model, interpreter and navigable browser for the original Xerox Smalltalk-80 v2 sources and virtual image file

mir - A lightweight JIT compiler based on MIR (Medium Internal Representation) and C11 JIT compiler and interpreter based on MIR

Shiori - Simple bookmark manager built with Go

Befunge - lang befunge 93 fast

rockstar - Makes you a Rockstar C++ Programmer in 2 minutes

simplelanguage - A simple example language built using the Truffle API.