perf(core): fix slow boot by fetching experiments and quota asynchronously (#25758)

Co-authored-by: Gal Zahavi <38544478+galz10@users.noreply.github.com>
Co-authored-by: David Pierce <davidapierce@google.com>
Co-authored-by: Keith Schaab <keithsc@google.com>
Co-authored-by: Keith Schaab <keith.schaab@gmail.com>
Co-authored-by: Emily Hedlund <ehedlund@google.com>

packages/core/src/config/config.test.ts

@@ -960,8 +960,11 @@ describe('Server Config (config.ts)', () => {
       });
 
       await config.refreshAuth(AuthType.LOGIN_WITH_GOOGLE);
+      await config.getExperimentsAsync();
 
-      expect(config.getModel()).toBe(PREVIEW_GEMINI_FLASH_MODEL);
+      await vi.waitFor(() => {
+        expect(config.getModel()).toBe(PREVIEW_GEMINI_FLASH_MODEL);
+      });
     });
 
     it('should NOT switch to flash model if user has Pro access and model is auto', async () => {

packages/core/src/config/config.ts

@@ -1590,8 +1590,12 @@ export class Config implements McpContext, AgentLoopContext {
         return undefined;
       });
 
-    // Fetch experiments and update timeouts before continuing initialization
-    const experiments = await this.experimentsPromise;
+    const [experiments] = await Promise.all([
+      this.experimentsPromise,
+      quotaPromise.catch((e) => {
+        debugLogger.error('Failed to fetch user quota', e);
+      }),
+    ]);
 
     const requestTimeoutMs = this.getRequestTimeoutMs();
     if (requestTimeoutMs !== undefined) {
@@ -1601,8 +1605,6 @@ export class Config implements McpContext, AgentLoopContext {
     // Initialize BaseLlmClient now that the ContentGenerator and experiments are available
     this.baseLlmClient = new BaseLlmClient(this.contentGenerator, this);
 
-    await quotaPromise;
-
     const authType = this.contentGeneratorConfig.authType;
     if (
       authType === AuthType.USE_GEMINI ||
@@ -1623,16 +1625,21 @@ export class Config implements McpContext, AgentLoopContext {
     const adminControlsEnabled =
       experiments?.flags[ExperimentFlags.ENABLE_ADMIN_CONTROLS]?.boolValue ??
       false;
-    const adminControls = await fetchAdminControls(
-      codeAssistServer,
-      this.getRemoteAdminSettings(),
-      adminControlsEnabled,
-      (newSettings: AdminControlsSettings) => {
-        this.setRemoteAdminSettings(newSettings);
-        coreEvents.emitAdminSettingsChanged();
-      },
-    );
-    this.setRemoteAdminSettings(adminControls);
+
+    try {
+      const adminControls = await fetchAdminControls(
+        codeAssistServer,
+        this.getRemoteAdminSettings(),
+        adminControlsEnabled,
+        (newSettings: AdminControlsSettings) => {
+          this.setRemoteAdminSettings(newSettings);
+          coreEvents.emitAdminSettingsChanged();
+        },
+      );
+      this.setRemoteAdminSettings(adminControls);
+    } catch (e) {
+      debugLogger.error('Failed to fetch admin controls', e);
+    }
 
     if ((await this.getProModelNoAccess()) && isAutoModel(this.model)) {
       this.setModel(PREVIEW_GEMINI_FLASH_MODEL);

packages/core/src/tools/trackerTools.test.ts

@@ -37,6 +37,7 @@ describe('Tracker Tools Integration', () => {
       model: 'gemini-3-flash',
       debugMode: false,
     });
+    await config.initialize();
     messageBus = new MessageBus(null as unknown as PolicyEngine, false);
   });
 
@@ -120,8 +121,14 @@ describe('Tracker Tools Integration', () => {
     );
 
     const tasks = await config.getTrackerService().listTasks();
-    const parentId = tasks.find((t) => t.title === 'Parent Task')!.id;
-    const childId = tasks.find((t) => t.title === 'Child Task')!.id;
+    const parentTask = tasks.find((t) => t.title === 'Parent Task');
+    const childTask = tasks.find((t) => t.title === 'Child Task');
+
+    expect(parentTask).toBeDefined();
+    expect(childTask).toBeDefined();
+
+    const parentId = parentTask!.id;
+    const childId = childTask!.id;
 
     // Add Dependency
     const addDepTool = new TrackerAddDependencyTool(config, messageBus);

packages/test-utils/src/test-rig.ts

@@ -680,6 +680,7 @@ export class TestRig {
         key !== 'GEMINI_DEBUG' &&
         key !== 'GEMINI_CLI_TEST_VAR' &&
         key !== 'GEMINI_CLI_INTEGRATION_TEST' &&
+        key !== 'GOOGLE_GEMINI_BASE_URL' &&
         !key.startsWith('GEMINI_CLI_ACTIVITY_LOG')
       ) {
         delete cleanEnv[key];