add telemetry for kernel launcher and finder (#11345)

Author: David Kutugata

src/client/datascience/constants.ts

@@ -279,6 +279,8 @@ export enum Telemetry {
     KernelSpecNotFound = 'DS_INTERNAL.KERNEL_SPEC_NOT_FOUND',
     KernelRegisterFailed = 'DS_INTERNAL.KERNEL_REGISTER_FAILED',
     KernelEnumeration = 'DS_INTERNAL.KERNEL_ENUMERATION',
+    KernelLauncherPerf = 'DS_INTERNAL.KERNEL_LAUNCHER_PERF',
+    KernelFinderPerf = 'DS_INTERNAL.KERNEL_FINDER_PERF',
     JupyterInstallFailed = 'DS_INTERNAL.JUPYTER_INSTALL_FAILED',
     UserInstalledModule = 'DATASCIENCE.USER_INSTALLED_MODULE',
     JupyterCommandLineNonDefault = 'DS_INTERNAL.JUPYTER_CUSTOM_COMMAND_LINE',

src/client/datascience/kernel-launcher/kernelFinder.ts

@@ -14,6 +14,8 @@ import {
     KNOWN_PATH_SERVICE,
     PythonInterpreter
 } from '../../interpreter/contracts';
+import { captureTelemetry } from '../../telemetry';
+import { Telemetry } from '../constants';
 import { JupyterKernelSpec } from '../jupyter/kernels/jupyterKernelSpec';
 import { IJupyterKernelSpec } from '../types';
 import { IKernelFinder } from './types';
@@ -52,6 +54,7 @@ export class KernelFinder implements IKernelFinder {
         @inject(IExtensionContext) private readonly context: IExtensionContext
     ) {}
 
+    @captureTelemetry(Telemetry.KernelFinderPerf)
     public async findKernelSpec(resource: Resource, kernelName?: string): Promise<IJupyterKernelSpec> {
         this.cache = await this.readCache();
         let foundKernel: IJupyterKernelSpec | undefined;

src/client/datascience/kernel-launcher/kernelLauncher.ts

@@ -16,6 +16,8 @@ import { createDeferred, Deferred } from '../../common/utils/async';
 import * as localize from '../../common/utils/localize';
 import { noop } from '../../common/utils/misc';
 import { IInterpreterService } from '../../interpreter/contracts';
+import { captureTelemetry } from '../../telemetry';
+import { Telemetry } from '../constants';
 import { IJupyterKernelSpec } from '../types';
 import { findIndexOfConnectionFile } from './kernelFinder';
 import { IKernelConnection, IKernelFinder, IKernelLauncher, IKernelProcess } from './types';
@@ -136,6 +138,7 @@ export class KernelLauncher implements IKernelLauncher {
         @inject(IFileSystem) private file: IFileSystem
     ) {}
 
+    @captureTelemetry(Telemetry.KernelLauncherPerf)
     public async launch(resource: Resource, kernelName?: string | IJupyterKernelSpec): Promise<IKernelProcess> {
         let kernelSpec: IJupyterKernelSpec;
         if (!kernelName || typeof kernelName === 'string') {

src/client/telemetry/index.ts

@@ -1880,6 +1880,14 @@ export interface IEventNamePropertyMapping {
          */
         source: 'cli' | 'connection';
     };
+    /**
+     * Total time taken to Launch a raw kernel.
+     */
+    [Telemetry.KernelLauncherPerf]: undefined | never;
+    /**
+     * Total time taken to find a kernel on disc.
+     */
+    [Telemetry.KernelFinderPerf]: undefined | never;
     /**
      * Telemetry event sent if there's an error installing a jupyter required dependency
      *