# Array push for (var i = 0, a = []; i < 100; i++) a.push(0); # Array assign for (var i = 0, a = new Array(100); i < 100;) a[i++] = 0; # Typed array conversion (最慢) [].slice.call(new Uint8Array(100)); # Binary concatenation for (var i = 100, a = [], add = [0]; i; i >>=1) { if (i & 1) a.push.apply(a, add); add.push.apply(add, add); } # Array Apply Array.apply(null, new Array(100)).map(Number.prototype.valueOf,0); # Array.fill() (最快) new Array(100).fill(0);
Most efficient way to create a zero filled JavaScript array? – Stack
Overflow Zero filled array creation