Object

https://www.youtube.com/watch?v=p-iiEDtpy6I

Array

flatten array

http://www.jstips.co/en/javascript/flattening-multidimensional-arrays-in-javascript/

v8

https://www.youtube.com/watch?v=EdFDJANJJLs

https://www.youtube.com/watch?v=HDuSEbLWyOY&t=725s

https://www.youtube.com/watch?v=YqOhBezMx1o&t=857s

https://docs.google.com/presentation/d/1LMqgqQkakTVmQOm221jld1OAiTFp7TBlFoVTDXtm608/edit\#slide=id.g34d38c9945\_1\_170

ES6 benchmarks

http://incaseofstairs.com/six-speed/

Tool

https://benchmarkjs.com/