Energy usage measurements on existing site

[thibaudcolas]

Preliminary results to reproduce: Grid-aware Wagtail website energy use

• Install sitespeed.io
• Measure CPU power usage with Firefox (via profiler or via sitespeed.io)
• Measure transfer size with Firefox (via profiler or via sitespeed.io)
• Export results in machine-readable format (see below)

Sitespeed.io prototype command:

sitespeed.io -b firefox --sustainable.enable --browsertime.firefox.geckoProfiler --browsertime.firefox.geckoProfilerParams.bufferSize 134217728 --browsertime.firefox.geckoProfilerParams.interval 10 --browsertime.firefox.geckoProfilerParams.features "screenshots,js,stackwalk,cpu,processcpu,nostacksampling,ipcmessages,markersallthreads,power" --browsertime.firefox.geckoProfilerParams.threads "GeckoMain,Renderer" --firefox.powerConsumption -n 1 urls.txt

[thibaudcolas]

Next step: more troubleshooting with sitespeed.io / R&D on how the tool works.

Options to help with this:

• Join and ask for support w/ Mozilla Firefox devs on Matrix (server location TBC)
• Alternative: use Firefox Profiler via DevTools

[thibaudcolas]

To complement the measurements work, it would be best if we had a way to automatically create a table of results for a specific run. Possibly there is a CSV / machine-readable export in sitespeed.io? We may need to create a script to convert it into our desired format:

• URL / path
• Firefox CPU energy (mWh)
• Estimated CO2 emissions (grams)
• Transfer size (KB)
• (Performance score)

[thibaudcolas]

Run on as many of the URLs below as possible. If some fail to run, that is fine:

/
/get-started/
/features/
/packages/
/wagtail-vs-wordpress/
/showcase/
/blog/
/wagtail-ai/
/headless/
/roadmap/
/services/
/who-uses-wagtail/
/search/
/business/
/feature-index/