Which of the built-in trig functions are fastest? slowest?

Compare array item removal methods.

Measures speed between using padStart and slice

- 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

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

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