labe-me/three.js — comment on commit 55f4c36f8be7694b0af92ce0f90ed5a24efe9089
File: src/extras/geometries/IcosahedronGeometry.js line 69
By alteredq:

`for(in)` loops are pest, shouldn't really be used for iterating over arrays.

Performance is terrible compared to regular `for(;;)` loops and also if you have some custom property on the array, it will fail.

Plus you can get different order of traversal in different browsers.