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

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

Trsut me bro

Find best solution for concatenate strings. Math.random() used to prevent any caching.

fork of https://www.measurethat.net/Benchmarks/Show/975/11/regex-vs-indexof-vs-startswith-vs-substr

Set array to [] vs splice

Compares slice, substr and substring to each other when there is only a start index