Duff装置
1 //credit: Speed Up Your Site (New Riders, 2003) 2 var iterations = Math.floor(value.length / 8); 3 var leftover = value.length % 8; 4 var i = 0; 5 6 if (leftover > 0) { 7 do { 8 process(values[i++]); 9 } while (--leftover > 0); 10 } 11 do { 12 process(value[i++]); 13 process(value[i++]); 14 process(value[i++]); 15 process(value[i++]); 16 process(value[i++]); 17 process(value[i++]); 18 process(value[i++]); 19 process(value[i++]); 20 } while (--iterations > 0);
