measures the speed of ramda's map vs Array's native map vs lodash map vs Immutable map

Compare the new ES6 spread operator with the traditional concat() method

g

100k list splice and shift win, they mutate list slice loose, it creates a copy of list 7.5x slower

Comparing speed of jQuery 3.3.1 selector, jQuery 1.9.0, vanilla JS querySelector, and vanilla JS getElementById

Includes vs indexOf

functions vs indexing