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> Google's proprietary PageSpeed Insights The previous version of PageSpeed Insights was open source (https://github.com/pagespeed/page-speed https://github.co
by jefftk 7y ago
> Google's proprietary PageSpeed Insights
The previous version of PageSpeed Insights was open source (https://github.com/pagespeed/page-speed https://github.com/pagespeed/page-speed) and the current version is a wrapper around Lighthouse which is also open source (https://github.com/GoogleChrome/lighthouse https://github.com/GoogleChrome/lighthouse).
(Disclosure: I work for Google)
- codyogden 7y agoI believe you, obviously. I have historically received drastically different results between, for example, web.dev / Lighthouse and PageSpeed Insights with the latter outputting a very low arbitrary 'rating' or 'score' and the former providing results I would expect. Like a lot of efforts at Google, things seem duplicated. As an outsider, it is a frustrating experience catering to Google's performance ideals because the tools and 'best practice' positions do not seem to be unified in one place.
- jefftk 7y agoI wonder if you might have had a bad experience with the old rules-based PageSpeed Insights? It wasn't as good as the current one, being more of a checklist of "have you done all these things that usually help" and not "we loaded the page, computed metrics, and this is how well it did".