[bodyloss]

Intrestingly it seems that the functional version he proposed is much faster than the OO version. http://jsperf.com/oop-vs-ramda

[CrossEye]

(Author of that talk (and co-author of Ramda) here. Your perf test only times the parsing of the function -- not exactly fair.

[derpface]

Hey man. Great work.

[pritambaral]

Fixed for actually running the tests instead of just parsing:

http://jsperf.com/oop-vs-ramda/3

TL;DR: Ramda is somewhat faster than OO one

[idlewan]

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.

[pritambaral]

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

[idlewan]

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.