Chrome Developer Tools[TimeLine] Calculating Aggregated Time from json trace file

[a12345...@gmail.com]

Hi all, I would like to calculate the summary provided in dev tools but without running chrome, from the trace.json file generated.

I have come across this on stackoverflow:

https://stackoverflow.com/questions/35576174/chrome-developer-toolstimeline-calculating-aggregated-time-from-json-trace-fil

3.01s Total

7.73ms Loading

49.45ms Scripting

120.07ms Rendering

3.76ms Painting

19.68ms Other

2.81s Idle

I have reviewed code in big-rig: https://github.com/googlearchive/node-big-rig/blob/master/lib/processor.js

And the trace event format: https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview#

I do not seem to understand how big-rig gets the duration value for each 'slice'.

How would I parse the json file and calculate this summary?

Any advice would be greatly appreciated.

Thanks

[a12345...@gmail.com]

I have found this which will probably work:

https://stackoverflow.com/questions/35145777/auto-record-and-save-chrome-developer-tools-profiling-data-on-page-load?rq=1

->

https://github.com/paulirish/automated-chrome-profiling/blob/master/readme.md#timeline-recording-example

->

https://github.com/paulirish/devtools-timeline-model