perf(ext/fetch): consume body using ops (#16038)

This commit adds a fast path to `Request` and `Response` that
make consuming request bodies much faster when using `Body#text`,
`Body#arrayBuffer`, and `Body#blob`, if the body is a FastStream.
Because the response bodies for `fetch` are FastStream, this speeds up
consuming `fetch` response bodies significantly.

1 files changed, 18 insertions, 0 deletions

diff --git a/cli/bench/http/node_post_bin.js b/cli/bench/http/node_post_bin.js
new file mode 100644
index 000000000..d0f2d6667
--- /dev/null
+++ b/cli/bench/http/node_post_bin.js
@@ -0,0 +1,18 @@
+// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
+const http = require("http");
+const port = process.argv[2] || "4544";
+console.log("port", port);
+http
+  .Server((req, res) => {
+    if (req.method == "POST") {
+      let chunks = [];
+      req.on("data", function (data) {
+        chunks.push(data);
+      });
+      req.on("end", function () {
+        const buffer = Buffer.concat(chunks);
+        res.end(buffer.byteLength.toString());
+      });
+    }
+  })
+  .listen(port);