From 9f1a49249d0f4bf218ea6ec0d4cb48ff92a15e31 Mon Sep 17 00:00:00 2001
From: Don Jayamanne <don.jayamanne@outlook.com>
Date: Mon, 23 Jan 2023 10:40:00 +1100
Subject: [PATCH 1/2] Add logging for exe start and stop times

---
 src/kernels/execution/cellExecutionCreator.ts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/kernels/execution/cellExecutionCreator.ts b/src/kernels/execution/cellExecutionCreator.ts
index 16c50ec571e..8a531d6201c 100644
--- a/src/kernels/execution/cellExecutionCreator.ts
+++ b/src/kernels/execution/cellExecutionCreator.ts
@@ -11,6 +11,7 @@ import {
     NotebookCellOutputItem,
     TextDocument
 } from 'vscode';
+import { traceVerbose } from '../../platform/logging';
 import { sendTelemetryEvent, Telemetry } from '../../telemetry';
 import { IKernelController } from '../types';
 
@@ -21,6 +22,7 @@ import { IKernelController } from '../types';
  */
 export class NotebookCellExecutionWrapper implements NotebookCellExecution {
     public started: boolean = false;
+    private _startTime?: number;
     constructor(
         private readonly _impl: NotebookCellExecution,
         public controllerId: string,
@@ -43,12 +45,19 @@ export class NotebookCellExecutionWrapper implements NotebookCellExecution {
         if (!this.started) {
             this.started = true;
             this._impl.start(startTime);
+            this._startTime = startTime;
+            traceVerbose(`Start cell ${this.cell.index} execution @ ${startTime}`);
         }
     }
     end(success: boolean | undefined, endTime?: number): void {
         if (this._endCallback) {
             try {
                 this._impl.end(success, endTime);
+                traceVerbose(
+                    `End cell ${this.cell.index} execution @ ${endTime}, started @ ${this._startTime}, elapsed time = ${
+                        (endTime || 0) - (this._startTime || 0)
+                    }`
+                );
             } finally {
                 this._endCallback();
                 this._endCallback = undefined;

From b5978db7a6438bc5b1a6f47f5e1a68ba2e633b6e Mon Sep 17 00:00:00 2001
From: Don Jayamanne <don.jayamanne@outlook.com>
Date: Mon, 23 Jan 2023 10:43:52 +1100
Subject: [PATCH 2/2] Misc

---
 src/kernels/execution/cellExecutionCreator.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/kernels/execution/cellExecutionCreator.ts b/src/kernels/execution/cellExecutionCreator.ts
index 8a531d6201c..adc1e3927ce 100644
--- a/src/kernels/execution/cellExecutionCreator.ts
+++ b/src/kernels/execution/cellExecutionCreator.ts
@@ -55,8 +55,8 @@ export class NotebookCellExecutionWrapper implements NotebookCellExecution {
                 this._impl.end(success, endTime);
                 traceVerbose(
                     `End cell ${this.cell.index} execution @ ${endTime}, started @ ${this._startTime}, elapsed time = ${
-                        (endTime || 0) - (this._startTime || 0)
-                    }`
+                        ((endTime || 0) - (this._startTime || 0)) / 1000
+                    }s`
                 );
             } finally {
                 this._endCallback();