Clear fix for mining malware & bad ux from slow js: formalize a notion of execution time/cycles for js and impose extremely low limits on what the browser will run.
Yes, serviceworker needs to be opt-in like location access, flash, etc. Right now it's totally unblockable without hacks...
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But even non-sw js needs low execution time cap.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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