Run results for: flat typed array vs 2d typed array

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
flat array set	260144480.0 Ops/sec
2d array set	239926224.0 Ops/sec
flat array get	274478304.0 Ops/sec
2d array get	241388304.0 Ops/sec

Script Preparation code:

var arrDim = 1000;


var clArr = new Array(arrDim);
for (var i = 0; i < arrDim; i++) {
    clArr[i] = new Uint8Array(arrDim);
}

clArr.getSlice = function(i) {
    return this[i];
}
clArr.setVal = function(i, j, val) {
    this[i][j] = val;
}
clArr.getVal = function(i, j) {
    return this[i][j];
}


var flArr = new Uint8Array(Math.pow(arrDim, 2));

flArr.getSlice = function(i) {
    var start = i*arrDim;
    return this.slice(start, start + arrDim);
}
flArr.setVal = function(i, j, val) {
    this[i*arrDim + j] = val;
}
flArr.getVal = function(i, j) {
    return this[i*arrDim + j];
}

Tests:

flat array set
flArr.setVal(123, 123, 1);
2d array set
clArr.setVal(123, 123, 1);
flat array get
flArr.getVal(123, 123);
2d array get
clArr.getVal(123, 123);

Run results for: flat typed array vs 2d typed array

flat array set

2d array set

flat array get

2d array get