chore(cli/bench): benchmark for raw HTTP ops (#15043)

cli/bench/http/deno_http_ops.js

@@ -0,0 +1,38 @@
+const addr = Deno.args[0] || "127.0.0.1:4500";
+const [hostname, port] = addr.split(":");
+const tcp = Deno.listen({ hostname, port: Number(port) });
+console.log("Server listening on", addr);
+
+class Http {
+  id;
+  constructor(id) {
+    this.id = id;
+  }
+  [Symbol.asyncIterator]() {
+    return {
+      next: async () => {
+        const reqEvt = await Deno.core.opAsync("op_http_accept", this.id);
+        return { value: reqEvt ?? undefined, done: reqEvt === null };
+      },
+    };
+  }
+}
+
+for await (const conn of tcp) {
+  const id = Deno.core.opSync("op_http_start", conn.rid);
+  const http = new Http(id);
+  (async () => {
+    for await (const req of http) {
+      if (req == null) continue;
+      const { 0: stream } = req;
+      await Deno.core.opAsync(
+        "op_http_write_headers",
+        stream,
+        200,
+        [],
+        "Hello World",
+      );
+      Deno.core.close(stream);
+    }
+  })();
+}