Exciting! Here's a WPT trace of the current http://dloky.com ; is there a better URL to analyse?: https://www.webpagetest.org/result/170413_PX_161A/ …
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Replying to @slightlylate
Quick thoughts about this trace: vendor.js is HUGE! (~360K gzipped, 1.5MB unzipped). Need to break that up and delay load parts as needed.
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Replying to @slightlylate
On first load over 3g, downloading and running just this script is pushing interactivity out past the 19s mark: https://www.webpagetest.org/result/170413_PX_161A/2/details/#waterfall_view_step1 …
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Replying to @slightlylate
Also in this waterfall, you see early requests for the Facebook SDK JS; perhaps delay those until (much, much) later?
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Replying to @slightlylate
Repeat view shows that some fonts aren't getting cached in your Service Worker: https://www.webpagetest.org/result/170413_PX_161A/2/details/cached/#waterfall_view_step1 …
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Replying to @slightlylate
Also, in the repeat view you can see that the trace is still dominated by waiting for the network connection to set up; not offline-first
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Replying to @slightlylate
To get reliable performance, you want to make sure that you don't need to rely on the network for the HTML file (top-level asset)
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Replying to @slightlylate
Filmstrip shows the impact that the size of vendor.js has on loading performance; it needs work: https://www.webpagetest.org/video/compare.php?tests=170413_PX_161A-r:1-c:0 …
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Replying to @slightlylate
This first load gets to interactivity at ~20s but you want to be under 5s.
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And lastly (for now), the lighthouse audit has a great burn-down list of things to look at: https://www.webpagetest.org/lighthouse.php?test=170413_PX_161A&run=2 …
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