Interesting differences in loops and incrementers

loop_bench.js

var i = 0, n = 100000000, t = 0;

console.time('i++');
for (; i < n; i++){
  t += 1;
}
console.timeEnd('i++');
//i++: 147ms

i = 0; t = 0;

console.time('++i');
for (; i < n; ++i){
  t += 1;
}
console.timeEnd('++i');
//++i: 183ms

i = 0; t = 0;

console.time('i+=1');
for (; i < n; i+=1){
  t += 1;
}
console.timeEnd('i+=1');
//i+=1: 147ms

after 10,000 runs it holds consistent that all methods end up being the same at about 150ms