Prepack helps make JavaScript code more efficient

Re:Prepack helps make JavaScript code more efficient by Kamgunz on Wednesday May 03, 2017 @04:18PM (#14259637)

Very interesting, nobody mentioned how formal and quite technical this README is, it goes really into details about what it does, and even future plans laid in three sections across 30 bullet points. One bullet point in the really far future sections said "instrument JavaScript code [in a non observable way]" emphasis mine, that part was noted in several other bullet points. It seems to me every compiler/transpiler/babel-plguin changes JavaScript code in a non observable way, no? Just a theory, but that undertone sounds to me like the ability to change/inject into JavaScript code undetectably on the fly in some super easy way.

Just another day at Facebook's office...

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Re:Prepack helps make JavaScript code more efficient by CGamesPlay on Wednesday May 03, 2017 @04:51PM (#14259944)

Your tin foil hat can go away when you consider that you're instrumenting code that will permanently run in an observable sandbox. You control the server (for node) and can watch what external requests it's making; and while you don't directly control the client, you do have access (via the web inspector) to all external requests it's making.

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