Use stdlib native modules in benchmarks

moreal · claude · moreal · commit e0c812d76007 · 2026-01-19T05:10:08.000+09:00
Change benchmark interpreter from without_stdlib to with_init to load
Rust-optimized native modules like _json, ensuring benchmarks measure
actual optimized performance rather than pure Python fallbacks.

Co-Authored-By: Claude Opus 4.5 &lt;noreply@anthropic.com&gt;
diff --git a/Cargo.toml b/Cargo.toml
@@ -54,6 +54,7 @@ rustyline = { workspace = true }
 [dev-dependencies]
 criterion = { workspace = true }
 pyo3 = { version = "0.27", features = ["auto-initialize"] }
+rustpython-stdlib = { workspace = true }
 
 [[bench]]
 name = "execution"
diff --git a/benches/execution.rs b/benches/execution.rs
@@ -3,6 +3,7 @@ use criterion::{
     measurement::WallTime,
 };
 use rustpython_compiler::Mode;
+use rustpython_stdlib;
 use rustpython_vm::{Interpreter, PyResult, Settings};
 use std::{collections::HashMap, hint::black_box, path::Path};
 
@@ -24,7 +25,10 @@ fn bench_rustpython_code(b: &mut Bencher, name: &str, source: &str) {
     settings.path_list.push("Lib/".to_string());
     settings.write_bytecode = false;
     settings.user_site_directory = false;
-    Interpreter::without_stdlib(settings).enter(|vm| {
+    Interpreter::with_init(settings, |vm| {
+        vm.add_native_modules(rustpython_stdlib::get_module_inits());
+    })
+    .enter(|vm| {
         // Note: bench_cpython is both compiling and executing the code.
         // As such we compile the code in the benchmark loop as well.
         b.iter(|| {
