Useful loop snipets in javascirpt.

high-performance.for-loop.snipet.js

var len = obj.length
for (var i= 0; i < len; i=(i+1)|0) {
  console.log(obj[i])
}

high-performance.while-loop.snipet.js

var arr = []
i = 0;
while(i < arr.length) {
    console.log(arr[i])
    i=(i+1)|0;
}