I believe @chadhietala has the WPT traces if you'd like to see them.
Anyhow, back to the data: What I care about (primarily) is interactivity, as defined by having meaningful content that will be responsive to input (i.e., the main thread isn't locked up). Both traces spend most of their main-thread time on...layout? Huh.
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What I get from this is that these test largely measure the effect of loading JS in parallel to data rather than serial: http://www.webpagetest.org/video/compare.php?tests=180202_67_ae21f1a34a7f570599edae125e1c292a-r%3A3-c%3A0%2C180202_VF_84ae556dc7c51e405d5fccccccb383ae-r%3A1-c%3A0&thumbSize=200&ival=100&end=full …pic.twitter.com/MxMNvM4E1L
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These are also wholly different to most of what I observe in "SSR" traces on more representative devices and networks. This isn't showing the huge script payload camping out on the main thread seconds after content arrives. In short, it's good work all around.
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