From 59a5817f876981433df8d39850575e2be9885bbc Mon Sep 17 00:00:00 2001
From: Simon Knott <info@simonknott.de>
Date: Wed, 7 Aug 2024 14:29:13 +0200
Subject: [PATCH] record capture time

---
 .../src/server/trace/recorder/snapshotterInjected.ts         | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/packages/playwright-core/src/server/trace/recorder/snapshotterInjected.ts b/packages/playwright-core/src/server/trace/recorder/snapshotterInjected.ts
index 057435a728..4b1a34b7e0 100644
--- a/packages/playwright-core/src/server/trace/recorder/snapshotterInjected.ts
+++ b/packages/playwright-core/src/server/trace/recorder/snapshotterInjected.ts
@@ -408,6 +408,8 @@ export function frameSnapshotStreamer(snapshotStreamer: string, removeNoScript:
         };
 
         if (nodeName === 'CANVAS') {
+          const start = performance.now();
+
           const canvas = node as HTMLCanvasElement;
           const requestedMIME = 'image/webp';
           const dataURL = canvas.toDataURL(requestedMIME);
@@ -422,6 +424,9 @@ export function frameSnapshotStreamer(snapshotStreamer: string, removeNoScript:
             this._capturedCanvases.add(sha);
             canvasRenderResults[sha] = contentsB64;
           }
+
+          const duration = performance.now() - start;
+          attrs['__playwright_canvas_time_'] = duration + 'ms';
         }
 
         if (nodeType === Node.DOCUMENT_FRAGMENT_NODE)