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fix: use a BufWriter to write perf.metadata #226

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Merged
GuillaumeLagrange merged 1 commit into from
Jan 29, 2026
Merged

fix: use a BufWriter to write perf.metadata #226

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6 changes: 5 additions & 1 deletion crates/runner-shared/src/metadata.rs
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
use anyhow::Context;
use serde::{Deserialize, Serialize};
use std::io::BufWriter;
use std::path::Path;

use crate::debug_info::ModuleDebugInfo;
Expand Down Expand Up @@ -36,7 +37,10 @@ impl PerfMetadata {

pub fn save_to<P: AsRef<Path>>(&self, path: P) -> anyhow::Result<()> {
let file = std::fs::File::create(path.as_ref().join("perf.metadata"))?;
serde_json::to_writer(file, self)?;
const BUFFER_SIZE: usize = 256 * 1024 /* 256 KB */;

let writer = BufWriter::with_capacity(BUFFER_SIZE, file);
serde_json::to_writer(writer, self)?;
Ok(())
}
}
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