Run results for: normalize vector - Math.sqrt vs all squared vs all squared 1

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Tests:

Math.sqrt
const x = 1; const y = -1; const velocity = { x: 0, y: 0 }; const length = Math.sqrt(x * x + y * y); velocity.x = length > 0 ? x / length : 0; velocity.y = length > 0 ? y / length : 0;
all squared
const x = 1; const y = -1; const velocity = { x: 0, y: 0 }; const lengthSquared = x ** 2 + y ** 2; velocity.x = (lengthSquared > 0 ? x ** 2 / lengthSquared : 0) * (x < 0 ? -1 : 1); velocity.y = (lengthSquared > 0 ? y ** 2 / lengthSquared : 0) * (y < 0 ? -1 : 1);
all squared 1
const x = 1; const y = -1; const velocity = { x: 0, y: 0 }; const lengthSquared = x ** 2 + y ** 2; const velocityScale = lengthSquared > 0 ? 1 / lengthSquared : 0; velocity.x = x * velocityScale; velocity.y = y * velocityScale;