Reduce with spread operator vs without on a large array

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

- https://github.com/MikeMcl/bignumber.js/tree/v9.0.0 - https://github.com/MikeMcl/big.js/tree/v5.2.2 - https://github.com/MikeMcl/decimal.js/tree/v10.2.0

flatMap vs filter map

reduce vs map.filter vs flatMap

flatMap vs filter map

It's not a deep validation; I'm just comparing ONE function that those two libraries have in common.

JS Memory Tests