attach import timings to worker manifest

Author: nicktrn

packages/cli-v3/src/entryPoints/dev-index-worker.ts

@@ -86,17 +86,18 @@ async function bootstrap() {
     forceFlushTimeoutMillis: 30_000,
   });
 
-  const importErrors = await registerResources(buildManifest);
+  const { importErrors, timings } = await registerResources(buildManifest);
 
   return {
     tracingSDK,
     config,
     buildManifest,
     importErrors,
+    timings,
   };
 }
 
-const { buildManifest, importErrors, config } = await bootstrap();
+const { buildManifest, importErrors, config, timings } = await bootstrap();
 
 let tasks = resourceCatalog.listTaskManifests();
 
@@ -158,6 +159,7 @@ await sendMessageInCatalog(
       loaderEntryPoint: buildManifest.loaderEntryPoint,
       customConditions: buildManifest.customConditions,
       initEntryPoint: buildManifest.initEntryPoint,
+      timings,
     },
     importErrors,
   },

packages/cli-v3/src/entryPoints/managed-index-worker.ts

@@ -86,17 +86,18 @@ async function bootstrap() {
     forceFlushTimeoutMillis: 30_000,
   });
 
-  const importErrors = await registerResources(buildManifest);
+  const { importErrors, timings } = await registerResources(buildManifest);
 
   return {
     tracingSDK,
     config,
     buildManifest,
     importErrors,
+    timings,
   };
 }
 
-const { buildManifest, importErrors, config } = await bootstrap();
+const { buildManifest, importErrors, config, timings } = await bootstrap();
 
 let tasks = resourceCatalog.listTaskManifests();
 
@@ -158,6 +159,7 @@ await sendMessageInCatalog(
       loaderEntryPoint: buildManifest.loaderEntryPoint,
       customConditions: buildManifest.customConditions,
       initEntryPoint: buildManifest.initEntryPoint,
+      timings,
     },
     importErrors,
   },

packages/cli-v3/src/indexing/registerResources.ts

@@ -3,14 +3,18 @@ import { normalizeImportPath } from "../utilities/normalizeImportPath.js";
 
 export async function registerResources(
   buildManifest: BuildManifest
-): Promise<ImportTaskFileErrors> {
+): Promise<{ importErrors: ImportTaskFileErrors; timings: Record<string, number> }> {
   const importErrors: ImportTaskFileErrors = [];
+  const timings: Record<string, number> = {};
 
   for (const file of buildManifest.files) {
     // Set the context before importing
     resourceCatalog.setCurrentFileContext(file.entry, file.out);
 
+    const start = performance.now();
     const [error, _] = await tryImport(file.out);
+    const end = performance.now();
+    timings[file.entry] = end - start;
 
     // Clear the context after import, regardless of success/failure
     resourceCatalog.clearCurrentFileContext();
@@ -34,7 +38,7 @@ export async function registerResources(
     }
   }
 
-  return importErrors;
+  return { importErrors, timings };
 }
 
 type Result<T> = [Error | null, T | null];

packages/core/src/v3/schemas/build.ts

@@ -90,6 +90,7 @@ export const WorkerManifest = z.object({
   initEntryPoint: z.string().optional(), // Optional init.ts entry point
   runtime: BuildRuntime,
   customConditions: z.array(z.string()).optional(),
+  timings: z.record(z.number()).optional(),
   otelImportHook: z
     .object({
       include: z.array(z.string()).optional(),