94513525b9
This reorders the operations in the VM's main `match` statement while evaluating bytecode according to the frequency with which these operations appear in some nixpkgs evaluations. I used raw data that looks like this: https://gist.github.com/tazjin/63d0788a78eb8575b04defaad4ef610d This has a small but noticeable impact on evaluation performance. No operations have changed in any way, this is purely moving code around. Change-Id: Iaa4ef4f0577e98144e8905fec88149c41e8c315c Reviewed-on: https://cl.tvl.fyi/c/depot/+/8262 Reviewed-by: raitobezarius <tvl@lahfa.xyz> Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI |
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.. | ||
benches | ||
builtin-macros | ||
docs | ||
proptest-regressions/value | ||
src | ||
tests | ||
.skip-subtree | ||
build.rs | ||
Cargo.toml | ||
default.nix | ||
README.md |
Tvix Evaluator
This project implements an interpreter for the Nix programming language. You can experiment with an online version of the evaluator: tvixbolt.
The interpreter aims to be compatible with nixpkgs
, on the
foundation of Nix 2.3.
Important note: The evaluator is not yet feature-complete, and while the core mechanisms (compiler, runtime, ...) have stabilised somewhat, a lot of components are still changing rapidly.
Please contact TVL with any questions you might have.
Building tvix-eval
Please check the README.md
one level up for instructions on how to build this.
The evaluator itself can also be built with standard Rust tooling (i.e. cargo build
).
If you would like to clone only the evaluator and build it directly with Rust tooling, you can do:
git clone https://code.tvl.fyi/depot.git:/tvix/eval.git tvix-eval
cd tvix-eval && cargo build
Nix test suite
C++ Nix implements a language test suite in the form of Nix source code files, and their expected output. The coverage of this test suite is not complete, but we intend to be compatible with it.
We have ported the test suite to Tvix, but do not run it by default as we are not yet compatible with it.
You can run the test suite by enabling the nix_tests
feature in
Cargo:
cargo test --features nix_tests
rnix-parser
Tvix is written in memory of jD91mZM2, the author of rnix-parser who sadly passed away.
Tvix makes heavy use of rnix-parser in its bytecode compiler. The parser is now maintained by Nix community members.