diff --git a/application/README.md b/application/README.md
index f03680422d..d91813f87b 100644
--- a/application/README.md
+++ b/application/README.md
@@ -61,5 +61,5 @@ Playwright で Visual Regression Test (VRT) を提供しています。
        ```
    - リモート環境に対してテストを実行する場合
      - ```bash
-       E2E_BASE_URL=https://web-speed-hackathon-2026.example.com pnpm run test
+       E2E_BASE_URL=https://pr-269-web-speed-hackathon-2026.fly.dev pnpm run test
        ```
diff --git a/application/client/babel.config.js b/application/client/babel.config.js
index c3c574591a..c222e03d07 100644
--- a/application/client/babel.config.js
+++ b/application/client/babel.config.js
@@ -13,7 +13,7 @@ module.exports = {
     [
       "@babel/preset-react",
       {
-        development: true,
+        development: false,
         runtime: "automatic",
       },
     ],
diff --git a/application/client/package.json b/application/client/package.json
index 9f8e80a6a8..af2d3a5156 100644
--- a/application/client/package.json
+++ b/application/client/package.json
@@ -5,7 +5,7 @@
   "license": "MPL-2.0",
   "author": "CyberAgent, Inc.",
   "scripts": {
-    "build": "NODE_ENV=development webpack",
+    "build": "NODE_ENV=production webpack",
     "typecheck": "tsc"
   },
   "dependencies": {
diff --git a/application/client/webpack.config.js b/application/client/webpack.config.js
index 9fae72647f..77d75f6e88 100644
--- a/application/client/webpack.config.js
+++ b/application/client/webpack.config.js
@@ -25,7 +25,7 @@ const config = {
     ],
     static: [PUBLIC_PATH, UPLOAD_PATH],
   },
-  devtool: "inline-source-map",
+  devtool: false,
   entry: {
     main: [
       "core-js",
@@ -36,7 +36,7 @@ const config = {
       path.resolve(SRC_PATH, "./index.tsx"),
     ],
   },
-  mode: "none",
+  mode: "production",
   module: {
     rules: [
       {
@@ -77,7 +77,7 @@ const config = {
       BUILD_DATE: new Date().toISOString(),
       // Heroku では SOURCE_VERSION 環境変数から commit hash を参照できます
       COMMIT_HASH: process.env.SOURCE_VERSION || "",
-      NODE_ENV: "development",
+      NODE_ENV: "production",
     }),
     new MiniCssExtractPlugin({
       filename: "styles/[name].css",
@@ -128,7 +128,7 @@ const config = {
     },
   },
   optimization: {
-    minimize: false,
+    minimize: true,
     splitChunks: false,
     concatenateModules: false,
     usedExports: false,
diff --git a/application/server/src/routes/api/crok.ts b/application/server/src/routes/api/crok.ts
index cfd6065951..bdd9ad87fb 100644
--- a/application/server/src/routes/api/crok.ts
+++ b/application/server/src/routes/api/crok.ts
@@ -34,15 +34,13 @@ crokRouter.get("/crok", async (req, res) => {
   let messageId = 0;
 
   // TTFT (Time to First Token)
-  await sleep(3000);
-
   for (const char of response) {
     if (res.closed) break;
 
     const data = JSON.stringify({ text: char, done: false });
     res.write(`event: message\nid: ${messageId++}\ndata: ${data}\n\n`);
 
-    await sleep(10);
+    await sleep(1);
   }
 
   if (!res.closed) {