I wrote a function to replace _.merge(). I am comparing the performance. https://github.com/thodges314/lodash-merge

Compares performance on the same task using Lodash vs Ramda vs Fastest Clone.

a

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

1M items list

A test summing 1000 random numbers, 1 - 10000

Test of lodash deepClone and json.stringify,json.parse

performance comparison of ways to find if an array contains a value

Check the performance inside a reduce.