doc: add benchmarks

README.md

@@ -97,6 +97,47 @@ Options:
   -V, --version                       Print version
 ```
 
+# Benchmark
+
+## Performance Comparison
+
+We used `hyperfine` for benchmarking `oha` against `rakyll/hey` on a local server. The server was coded using node. You can start the server by copy pasting this file and then running it via node. After copy-pasting the file, you can run the benchmark via `hyperfine`.
+
+1. Copy-paste the contents into a new javascript file called app.js
+
+```js
+const http = require("http");
+
+const server = http.createServer((req, res) => {
+  res.writeHead(200, { "Content-Type": "text/plain" });
+
+  res.end("Hello World\n");
+});
+
+server.listen(3000, () => {
+  console.log("Server running at http://localhost:3000/");
+});
+```
+
+2. Run `node app.js`
+3. Run `hyperfine 'oha --no-tui http://localhost:3000' 'hey http://localhost:3000'` in a different terminal tab
+
+### Benchmark Results
+
+Benchmark 1: oha --no-tui http://localhost:3000
+
+- Time (mean ± σ): 10.8 ms ± 1.8 ms [User: 5.7 ms, System: 11.7 ms]
+- Range (min … max): 8.7 ms … 24.8 ms (107 runs)
+
+Benchmark 2: hey http://localhost:3000
+
+- Time (mean ± σ): 14.3 ms ± 4.6 ms [User: 12.2 ms, System: 19.4 ms]
+- Range (min … max): 11.1 ms … 48.3 ms (88 runs)
+
+### Summary
+
+In this benchmark, `oha --no-tui http://localhost:3000` was found to be faster, running approximately 1.32 ± 0.48 times faster than `hey http://localhost:3000`.
+
 # Tips
 
 ## Stress test in more realistic condition