Benchmark: Can JavaScript benefit from the ECS pattern 2? With split components position and health

Can JavaScript benefit from the ECS pattern 2? With split components position and health (version: 1)

JS arrays are weird and (probably?) not memory-contiguous, but just for kicks, let's see what difference there is (if any) between performing the same action on 1,000,000 objects in an object-oriented style (with the method attached to the object) vs an ECS-style (with the behavior separated from the raw data)

Comparing performance of: OO-style vs ECS-style

Created: 6 months ago by: Guest

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Script Preparation code:

class Point {
  constructor(x, y) {
    this.x = x;
    this.y = y;
    this.health = 100;
  }

  tick() {
    this.x += 2;
    this.y += 2;
  }
  
  takeDamage()
  {
    this.health -= 1;
  }
}

var pointClasses = [];

var pointObjects = [];
var healthObjects = [];

for (let i = 0; i < 1000000; i++) {
  pointClasses.push(new Point(0, 0));
  pointObjects.push({ x: 0, y: 0 });
  pointObjects.push({ health: 100 });
}

Tests:

OO-style
pointClasses.forEach((point) => { point.tick(); point.tick(); });
ECS-style
pointObjects.forEach((point) => { point.x += 2; point.y += 2; point.x += 2; point.y += 2; }); pointObjects.forEach((point) => { point.health -= 2; point.health -= 2; });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
OO-style
ECS-style

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 6 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:143.0) Gecko/20100101 Firefox/143.0

Browser/OS: Firefox 143 on Linux

View result in a separate tab

Test name	Executions per second
OO-style	226.8 Ops/sec
ECS-style	21.1 Ops/sec

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