Has anyone done measurements about perf implications of CSS in JS vs old school stylesheets? Wondering what the trade off is there. 
: I (or @ElliottZ) can give you the Blink-side view: TL;DR, slow in ways that compound w/ scale
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: I (or @ElliottZ) can give you the Blink-side view: TL;DR, slow in ways that compound w/ scale