Add benchmark for small write() performance

1 files changed, 27 insertions, 0 deletions

diff --git a/bench/snippets/write.node.mjs b/bench/snippets/write.node.mjs
new file mode 100644
index 000000000..bafaceecb
--- /dev/null
+++ b/bench/snippets/write.node.mjs
@@ -0,0 +1,27 @@
+import { bench, run } from "mitata";
+import { openSync } from "fs";
+import { writeFile } from "fs/promises";
+import { writeSync as write } from "fs";
+
+bench("writeFile(/tmp/foo.txt, short string)", async () => {
+  await writeFile("/tmp/foo.txt", "short string", "utf8");
+});
+
+const buffer = Buffer.from("short string");
+bench("writeFile(/tmp/foo.txt, Buffer.from(short string))", async () => {
+  await writeFile("/tmp/foo.txt", buffer);
+});
+
+const fd = openSync("/tmp/foo.txt", "w");
+
+bench("write(fd, short string)", () => {
+  const bytesWritten = write(fd, "short string", "utf8");
+  if (bytesWritten !== 12) throw new Error("wrote !== 12");
+});
+
+bench("write(fd, Uint8Array(short string))", () => {
+  const bytesWritten = write(fd, buffer);
+  if (bytesWritten !== 12) throw new Error("wrote !== 12");
+});
+
+await run();