OXC Angular Compiler Performance Study

oxc-angular-compiler is a Rust Angular template compiler built on OXC, distributed as a native Node module via NAPI-RS. I benchmarked it against @angular/compiler 100 iterations, 20 warmup, five template sizes on Apple Silicon (darwin/arm64, Node v22.12.0).

Compilation time

Small templates are a wash. Things diverge at larger sizes: at 4566 chars legacy runs at 0.57ms, OXC at 1.88ms. The template-parse-only stage of OXC is faster across the board but that excludes code generation so it is not a direct comparison.

Tail latency

Legacy has heavier tails at small template sizes. P99 for the small fixture is 0.262ms vs 0.105ms for OXC. For incremental dev builds where you are recompiling one component at a time, that matters.

Memory

OXC uses far less memory on small templates. That reverses at xlarge.

Scaling

Legacy holds throughput well as template size grows. OXC degrades past ~1000 chars, likely NAPI bridge overhead.

The raw results are in benchmarks/ of the repo if you want to run it yourself.