Add microbenchmark

1 files changed, 42 insertions, 0 deletions

diff --git a/bench/snippets/write-file-huge.mjs b/bench/snippets/write-file-huge.mjs
new file mode 100644
index 000000000..62790c6eb
--- /dev/null
+++ b/bench/snippets/write-file-huge.mjs
@@ -0,0 +1,42 @@
+import { Buffer } from "node:buffer";
+import { writeFile } from "node:fs/promises";
+import { bench, run } from "mitata";
+
+var hugeFile = Buffer.alloc(1024 * 1024 * 64);
+var medFile = Buffer.alloc(1024 * 1024 * 16);
+var humongousFile = Buffer.alloc(1024 * 1024 * 256);
+
+bench(
+  `fs.writeFile ${new Intl.NumberFormat("en-US", {
+    style: "unit",
+    unit: "megabyte",
+    unitDisplay: "narrow",
+  }).format(humongousFile.byteLength / 1024 / 1024)}`,
+  async () => {
+    await writeFile("/tmp/bun.bench-out.humongousFile.txt" + ((Math.random() * 65432) | 0).toString(16), humongousFile);
+  },
+);
+
+bench(
+  `fs.writeFile ${new Intl.NumberFormat("en-US", {
+    style: "unit",
+    unit: "megabyte",
+    unitDisplay: "narrow",
+  }).format(hugeFile.byteLength / 1024 / 1024)}`,
+  async () => {
+    await writeFile("/tmp/bun.bench-out.huge.txt" + ((Math.random() * 65432) | 0).toString(16), hugeFile);
+  },
+);
+
+bench(
+  `fs.writeFile ${new Intl.NumberFormat("en-US", {
+    style: "unit",
+    unit: "megabyte",
+    unitDisplay: "narrow",
+  }).format(medFile.byteLength / 1024 / 1024)}`,
+  async () => {
+    await writeFile("/tmp/bun.bench-out.medium.txt" + ((Math.random() * 65432) | 0).toString(16), medFile);
+  },
+);
+
+await run();