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Fixed for running a proper imperative version instead of the functional-oriented 'imperative' version of the original author:

http://jsperf.com/oop-vs-ramda/4

TL;DR: Imperative is faster than functional. Functional is shorter (33% slower in chromium, 83% slower in firefox), but might be more readable depending on your preferences.

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Pardon me if I read it wrong, but you just removed the promises, didn't you?

Anyway, doing the same to the FP version yields almost equal speeds (Chromium):

http://jsperf.com/oop-vs-fp

I removed all the useless promises, yes.

The one remaining is the one after fetchData, which looks like it could be async and make use of a promise.

It only yields equal speeds in chromium (good to know), although if you try in firefox, imperative is still 4 times faster.

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