From 119dff3b7331429dfc55df45ad570b266e998110 Mon Sep 17 00:00:00 2001
From: Sehoon Shon <sshon@google.com>
Date: Tue, 31 Mar 2026 13:46:36 -0400
Subject: [PATCH] perf(build): optimize build scripts for parallel execution
 and remove redundant checks (#24307)

---
 packages/vscode-ide-companion/package.json |  2 +-
 scripts/build.js                           | 27 +++++++++++++++++++++-
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/packages/vscode-ide-companion/package.json b/packages/vscode-ide-companion/package.json
index ac47bbf0be..b2a2912c7e 100644
--- a/packages/vscode-ide-companion/package.json
+++ b/packages/vscode-ide-companion/package.json
@@ -108,7 +108,7 @@
   "scripts": {
     "prepackage": "npm run generate:notices && npm run check-types && npm run lint && npm run build:prod",
     "build": "npm run build:dev",
-    "build:dev": "npm run check-types && npm run lint && node esbuild.js",
+    "build:dev": "node esbuild.js",
     "build:prod": "node esbuild.js --production",
     "generate:notices": "node ./scripts/generate-notices.js",
     "prepare": "npm run generate:notices",
diff --git a/scripts/build.js b/scripts/build.js
index 8a525e98e3..e6aa14faa9 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -32,7 +32,32 @@ if (!existsSync(join(root, 'node_modules'))) {
 
 // build all workspaces/packages
 execSync('npm run generate', { stdio: 'inherit', cwd: root });
-execSync('npm run build --workspaces', { stdio: 'inherit', cwd: root });
+
+if (process.env.CI) {
+  console.log('CI environment detected. Building workspaces sequentially...');
+  execSync('npm run build --workspaces', { stdio: 'inherit', cwd: root });
+} else {
+  // Build core first because everyone depends on it
+  console.log('Building @google/gemini-cli-core...');
+  execSync('npm run build -w @google/gemini-cli-core', {
+    stdio: 'inherit',
+    cwd: root,
+  });
+
+  // Build the rest in parallel
+  console.log('Building other workspaces in parallel...');
+  const workspaceInfo = JSON.parse(
+    execSync('npm query .workspace --json', { cwd: root, encoding: 'utf-8' }),
+  );
+  const parallelWorkspaces = workspaceInfo
+    .map((w) => w.name)
+    .filter((name) => name !== '@google/gemini-cli-core');
+
+  execSync(
+    `npx npm-run-all --parallel ${parallelWorkspaces.map((w) => `"build -w ${w}"`).join(' ')}`,
+    { stdio: 'inherit', cwd: root },
+  );
+}
 
 // also build container image if sandboxing is enabled
 // skip (-s) npm install + build since we did that above