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Understanding process breakdown
01-31-2014, 03:23 AM
Post: #1
Understanding process breakdown
Dear community,

I need your help to have a better understaing of what process breakdown categories means.

I would like to have a link to documentation or at least a summary of these categories:
  • Scripting
  • Rendering
  • Loading
  • Painting

And these events:
  • Program
  • Function Call
  • Layout
  • Evaluate Script
  • Recalculate Styles
  • CompositeLayers
  • ResourceReceiversData
  • Paint
  • GCEvent
  • Timefire
  • PaintSetup
  • EventDispatch

Thank you all in advance for answering.

TechED
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02-07-2014, 12:46 AM
Post: #2
RE: Understanding process breakdown
Those are just a breakdown of the Chrome Timeline. The dev tools docs are probably your best resource for that: https://developers.google.com/chrome-dev...s/timeline
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08-29-2018, 09:42 PM
Post: #3
RE: Understanding process breakdown
Hi Webpagetest Team, I have found some differences between the results shown in the timeline view and the ones given directly on the Chrome Dev Tools. I understand the Breakdown timeline may not show all the detail information, but 1. why is the "Composite Layout" task not appearing like the scripting, rendering and paint tasks? Furthermore, 2. I have noticed that above a "click" event task there is always a "Animation Frame Fired" task. When i record the same event directly on Chrome dev tools this task does not appear(at least not over the "click" event task).

Here the timeline example:
http://www.webpagetest.org/chrome/inspec...:1,c:0,s:2
Here the full test:
http://www.webpagetest.org/result/180827...a92404075/

Thanks a lot!! Smile
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