Run results for: Optimization function

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.119 Safari/537.36 OPR/51.0.2830.26

Browser: Opera 51

Operating system: Windows

Device Platform: Other

Date tested: 2025 years ago

Test name	Executions per second
A	4.8 Ops/sec
B	4.8 Ops/sec
C	4.7 Ops/sec

Script Preparation code:

var layr = 0;
var map = {
  tileWidth: 32,
  tileHeight: 32,
  currentLayer: 0,
  layers: [{data: {width: 18, height: 18}}]
}

function snapToFloor(input, gap, start) {
  if (typeof start === "undefined") { start = 0; }
  if (gap == 0) {
    return input;
  }
  input -= start;
  input = gap * Math.floor(input / gap);
  return start + input;
}

function A(x, y, tileWidth, tileHeight, layr) {
  if (typeof layr === "undefined") {
    layr = map.currentLayer;
  }
  x = snapToFloor(x, tileWidth) / tileWidth;
  y = snapToFloor(y, tileHeight) / tileHeight;
  if (x >= 0 && x < map.layers[layr].width && y >= 0 && y < map.layers[layr].height) {
    return map.layers[layr].data[y][x];
  }
}

function B(x, y, tileWidth, tileHeight, layr) {
  x = snapToFloor(x, tileWidth) / tileWidth;
  y = snapToFloor(y, tileHeight) / tileHeight;
  if (x >= 0 && x < map.layers[layr].width && y >= 0 && y < map.layers[layr].height) {
    return map.layers[layr].data[y][x];
  }
}

function C(x, y, tileWidth, tileHeight, layr) {
  x = snapToFloor(x, tileWidth) / tileWidth;
  y = snapToFloor(y, tileHeight) / tileHeight;
  if (x < map.layers[layr].width && y < map.layers[layr].height) {
    return map.layers[layr].data[y][x];
  }
}

Tests:

A
for(var x = 0; x < 500; x++){ for(var y = 0; y < 500; y++){ A(x, y, map.tileWidth, map.tileHeight, layr); } }
B
for(var x = 0; x < 500; x++){ for(var y = 0; y < 500; y++){ B(x, y, map.tileWidth, map.tileHeight, layr); } }
C
for(var x = 0; x < 500; x++){ for(var y = 0; y < 500; y++){ C(x, y, map.tileWidth, map.tileHeight, layr); } }