1 files changed, 30 insertions, 0 deletions
diff --git a/cli/bench/deno_tcp_proxy.ts b/cli/bench/deno_tcp_proxy.ts
new file mode 100644
index 000000000..db693b690
--- /dev/null
+++ b/cli/bench/deno_tcp_proxy.ts
@@ -0,0 +1,30 @@
+// Used for benchmarking Deno's tcp proxy performance.
+const addr = Deno.args[0] || "127.0.0.1:4500";
+const originAddr = Deno.args[1] || "127.0.0.1:4501";
+
+const [hostname, port] = addr.split(":");
+const [originHostname, originPort] = originAddr.split(":");
+
+const listener = Deno.listen({ hostname, port: Number(port) });
+
+async function handle(conn: Deno.Conn): Promise<void> {
+  const origin = await Deno.connect({
+    hostname: originHostname,
+    port: Number(originPort),
+  });
+  try {
+    await Promise.all([Deno.copy(conn, origin), Deno.copy(origin, conn)]);
+  } catch (err) {
+    if (err.message !== "read error" && err.message !== "write error") {
+      throw err;
+    }
+  } finally {
+    conn.close();
+    origin.close();
+  }
+}
+
+console.log(`Proxy listening on http://${addr}/`);
+for await (const conn of listener) {
+  handle(conn);
+}