The article links to a bunch of jsperf.com benchmarks, but I believe[1][2] these microbenchmarks are not very useful, since they don't reflect real-time perform

The article links to a bunch of jsperf.com benchmarks, but I believe[1][2] these microbenchmarks are not very useful, since they don't reflect real-time performance differences. 1. http://mrale.ph/blog/2014/02/23/the-black-cat-of-microbenchmarks.html http://mrale.ph/blog/2014/02/23/the-black-cat-of-microbenchm... 2. http://mrale.ph/blog/2014/12/24/array-length-caching.html http://mrale.ph/blog/2014/12/24/array-length-caching.html