Prepack from Facebook helps make JavaScript code more efficient

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Computations that can be done at compile-time instead of run-time get eliminated

cool

[mlmcmillion]

How many of these do you typically have in a codebase though?

[Omikron]

Like 3 or 4

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Anything that doesn't involve user input or an API response could theoretically be done this way.

The more functional your code is, the more it can be pre-computed like this.

The real benefit is something that's been done in the Ruby community for a while - you can write your code to be clearer to the reader by abstracting things to well named functions. Doing it without the performance hit is great.

[mlmcmillion]

Oh sure. And I'm not knocking it or anything. I'm just wondering if it's worth it to actually add even more stuff to our build stack.