feat: ability to turn off import durations collection

packages/runner/src/types/runner.ts

@@ -38,6 +38,7 @@ export interface VitestRunnerConfig {
   hookTimeout: number
   retry: number
   includeTaskLocation?: boolean
+  includeImportDurations?: boolean
   diffOptions?: DiffOptions
 }
 

packages/vitest/src/node/cli/cli-config.ts

@@ -725,6 +725,9 @@ export const cliOptionsConfig: VitestCLIOptions = {
   includeTaskLocation: {
     description: 'Collect test and suite locations in the `location` property',
   },
+  includeImportDurations: {
+    description: 'Collect `importDurtaions`',
+  },
   attachmentsDir: {
     description: 'The directory where attachments from `context.annotate` are stored in (default: `.vitest-attachments`)',
     argument: '<dir>',

packages/vitest/src/node/config/resolveConfig.ts

@@ -785,6 +785,8 @@ export function resolveConfig(
     resolved.includeTaskLocation ??= true
   }
 
+  resolved.includeImportDurations ??= true
+
   resolved.server ??= {}
   resolved.server.deps ??= {}
 

packages/vitest/src/node/config/serializeConfig.ts

@@ -94,6 +94,9 @@ export function serializeConfig(project: TestProject): SerializedConfig {
     includeTaskLocation:
       config.includeTaskLocation
       ?? globalConfig.includeTaskLocation,
+    includeImportDurations:
+      config.includeImportDurations
+      ?? globalConfig.includeImportDurations,
     env: {
       ...viteConfig?.env,
       ...config.env,

packages/vitest/src/node/types/config.ts

@@ -819,6 +819,13 @@ export interface InlineConfig {
    */
   includeTaskLocation?: boolean
 
+  /**
+   * Include "importDurations" property inside the test definition
+   *
+   * @default true
+   */
+  includeImportDurations?: boolean
+
   /**
    * Directory path for storing attachments created by `context.annotate`
    *

packages/vitest/src/runtime/config.ts

@@ -79,6 +79,7 @@ export interface SerializedConfig {
   diff: string | SerializedDiffOptions | undefined
   retry: number
   includeTaskLocation: boolean | undefined
+  includeImportDurations: boolean | undefined
   inspect: boolean | string | undefined
   inspectBrk: boolean | string | undefined
   inspector: {

packages/vitest/src/runtime/moduleRunner/moduleDebug.ts

@@ -29,6 +29,7 @@ export interface ExecutionInfoOptions {
   startOffset: number
   external?: boolean
   importer?: string
+  includeImportDurations?: boolean
 }
 
 const performanceNow = performance.now.bind(performance)
@@ -37,6 +38,13 @@ export class ModuleDebug {
   private executionStack: ExecutionStack = []
 
   startCalculateModuleExecutionInfo(filename: string, options: ExecutionInfoOptions): () => ModuleExecutionInfoEntry {
+    if (!options.includeImportDurations) {
+      return () => ({
+        startOffset: options.startOffset,
+        duration: 0,
+        selfTime: 0,
+      })
+    }
     const startTime = performanceNow()
 
     this.executionStack.push({

packages/vitest/src/runtime/moduleRunner/moduleEvaluator.ts

@@ -31,6 +31,7 @@ export interface VitestModuleEvaluatorOptions {
   getCurrentTestFilepath?: () => string | undefined
   compiledFunctionArgumentsNames?: string[]
   compiledFunctionArgumentsValues?: unknown[]
+  includeImportDurations?: boolean
   /**
    * @internal
    */
@@ -113,6 +114,7 @@ export class VitestModuleEvaluator implements ModuleEvaluator {
     const finishModuleExecutionInfo = this.debug.startCalculateModuleExecutionInfo(
       filename,
       {
+        includeImportDurations: this.options.includeImportDurations,
         startOffset: 0,
         external: true,
         importer,
@@ -313,6 +315,7 @@ export class VitestModuleEvaluator implements ModuleEvaluator {
     // this will always be 1 element because it's cached after load
     const importer = module.importers.values().next().value
     const finishModuleExecutionInfo = this.debug.startCalculateModuleExecutionInfo(options.filename, {
+      includeImportDurations: this.options.includeImportDurations,
       startOffset: codeDefinition.length,
       importer,
     })

packages/vitest/src/runtime/moduleRunner/startModuleRunner.ts

@@ -72,6 +72,7 @@ export function startVitestModuleRunner(options: ContextModuleRunnerOptions): Vi
         return state().config.deps.interopDefault
       },
       getCurrentTestFilepath: () => state().filepath,
+      includeImportDurations: state().config.includeImportDurations,
     },
   )
 

packages/vitest/src/runtime/runners/test.ts

@@ -227,6 +227,10 @@ export class VitestTestRunner implements VitestRunner {
   }
 
   getImportDurations(): Record<string, ImportDuration> {
+    if (!this.config.includeImportDurations) {
+      return {}
+    }
+
     const importDurations: Record<string, ImportDuration> = {}
     const entries = this.workerState.moduleExecutionInfo?.entries() || []