feat: set NODE_OPTIONS to get perf map from node

Author: GuillaumeLagrange

crates/exec-harness/src/analysis/mod.rs

@@ -59,6 +59,8 @@ pub fn perform_with_valgrind(commands: Vec<BenchmarkCommand>) -> Result<()> {
         cmd.env("PYTHONPERFSUPPORT", "1");
         cmd.env(constants::URI_ENV, &name_and_uri.uri);
 
+        crate::node::set_node_options(&mut cmd);
+
         let mut child = cmd.spawn().context("Failed to spawn command")?;
 
         let status = child.wait().context("Failed to execute command")?;

crates/exec-harness/src/lib.rs

@@ -5,6 +5,7 @@ use std::io::{self, BufRead};
 
 pub mod analysis;
 pub mod constants;
+pub mod node;
 pub mod prelude;
 mod uri;
 pub mod walltime;

crates/exec-harness/src/node.rs

@@ -0,0 +1,18 @@
+use std::process::Command;
+
+const NODE_OPTIONS_TO_ADD: &[&str] = &["--perf-basic-prof"];
+
+/// Appends CodSpeed-required Node.js options to `NODE_OPTIONS` on a [`Command`],
+/// preserving any existing value from the environment.
+pub fn set_node_options(cmd: &mut Command) {
+    let existing = std::env::var("NODE_OPTIONS").unwrap_or_default();
+    let mut parts: Vec<&str> = existing.split_whitespace().collect();
+
+    for opt in NODE_OPTIONS_TO_ADD {
+        if !parts.contains(opt) {
+            parts.push(opt);
+        }
+    }
+
+    cmd.env("NODE_OPTIONS", parts.join(" "));
+}

crates/exec-harness/src/walltime/benchmark_loop.rs

@@ -15,10 +15,10 @@ pub fn run_rounds(
     let hooks = InstrumentHooks::instance(INTEGRATION_NAME, INTEGRATION_VERSION);
 
     let do_one_round = || -> Result<(u64, u64)> {
-        let mut child = Command::new(&command[0])
-            .args(&command[1..])
-            .spawn()
-            .context("Failed to execute command")?;
+        let mut cmd = Command::new(&command[0]);
+        cmd.args(&command[1..]);
+        crate::node::set_node_options(&mut cmd);
+        let mut child = cmd.spawn().context("Failed to execute command")?;
         let bench_round_start_ts_ns = InstrumentHooks::current_timestamp();
         let status = child
             .wait()