fetch optimizations (#9402)

Release deno_fetch 0.20.2

Cargo.lock

@@ -501,7 +501,7 @@ dependencies = [
 
 [[package]]
 name = "deno_fetch"
-version = "0.20.1"
+version = "0.20.2"
 dependencies = [
  "bytes",
  "deno_core",

cli/Cargo.toml

@@ -25,7 +25,7 @@ path = "./bench/main.rs"
 
 [build-dependencies]
 deno_core = { path = "../core", version = "0.77.1" }
-deno_fetch = { path = "../op_crates/fetch", version = "0.20.1" }
+deno_fetch = { path = "../op_crates/fetch", version = "0.20.2" }
 deno_web = { path = "../op_crates/web", version = "0.28.1" }
 deno_websocket = { path = "../op_crates/websocket", version = "0.3.1" }
 regex = "1.4.3"

op_crates/fetch/26_fetch.js

@@ -682,6 +682,10 @@
 
   const teeBody = Symbol("Body#tee");
 
+  // fastBody and dontValidateUrl allow users to opt out of certain behaviors
+  const fastBody = Symbol("Body#fast");
+  const dontValidateUrl = Symbol("dontValidateUrl");
+
   class Body {
     #contentType = "";
     #size;
@@ -730,6 +734,17 @@
       return this.#stream;
     }
 
+    // Optimization that allows caller to bypass expensive ReadableStream.
+    [fastBody]() {
+      if (!this.#bodySource) {
+        return null;
+      } else if (!(this.#bodySource instanceof ReadableStream)) {
+        return bodyToArrayBuffer(this.#bodySource);
+      } else {
+        return this.body;
+      }
+    }
+
     /** @returns {BodyInit | null} */
     [teeBody]() {
       if (this.#stream || this.#bodySource instanceof ReadableStream) {
@@ -990,12 +1005,18 @@
         this.#url = input.url;
         this.#headers = new Headers(input.headers);
         this.#credentials = input.credentials;
+      } else {
+        // Constructing a URL just for validation is known to be expensive.
+        // dontValidateUrl allows one to opt out.
+        if (init[dontValidateUrl]) {
+          this.#url = input;
         } else {
           const baseUrl = getLocationHref();
           this.#url = baseUrl != null
             ? new URL(String(input), baseUrl).href
             : new URL(String(input)).href;
         }
+      }
 
       if (init && "method" in init && init.method) {
         this.#method = normalizeMethod(init.method);
@@ -1477,5 +1498,7 @@
     Response,
     HttpClient,
     createHttpClient,
+    fastBody,
+    dontValidateUrl,
   };
 })(this);

op_crates/fetch/Cargo.toml

@@ -2,7 +2,7 @@
 
 [package]
 name = "deno_fetch"
-version = "0.20.1"
+version = "0.20.2"
 edition = "2018"
 description = "provides fetch Web API to deno_core"
 authors = ["the Deno authors"]

runtime/Cargo.toml

@@ -20,7 +20,7 @@ path = "examples/hello_runtime.rs"
 [build-dependencies]
 deno_core = { path = "../core", version = "0.77.1" }
 deno_crypto = { path = "../op_crates/crypto", version = "0.11.1" }
-deno_fetch = { path = "../op_crates/fetch", version = "0.20.1" }
+deno_fetch = { path = "../op_crates/fetch", version = "0.20.2" }
 deno_web = { path = "../op_crates/web", version = "0.28.1" }
 deno_websocket = { path = "../op_crates/websocket", version = "0.3.1" }
 
@@ -31,7 +31,7 @@ winapi = "0.3.9"
 [dependencies]
 deno_core = { path = "../core", version = "0.77.1" }
 deno_crypto = { path = "../op_crates/crypto", version = "0.11.1" }
-deno_fetch = { path = "../op_crates/fetch", version = "0.20.1" }
+deno_fetch = { path = "../op_crates/fetch", version = "0.20.2" }
 deno_web = { path = "../op_crates/web", version = "0.28.1" }
 deno_websocket = { path = "../op_crates/websocket", version = "0.3.1" }