Run results for: Testing array normalizastion

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_0) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0 Safari/605.1.15

Browser: Safari 14

Operating system: Mac OS X 11.0

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Object based	293671400.0 Ops/sec
Array based	294517100.0 Ops/sec

Script Preparation code:

Array.from(Array(10).keys()).map((i) => ({
  id: i+1,
  name: 'Bar',
  asd: 123123
}));

Array.from(Array(5).keys()).map((i) => ({
  id: i+5,
  title: 'Bar',
  age: 12
}));

Tests:

Object based
const normalizeLiveUpdateData = ( newData, oldaData ) => { if (!oldAnnotations) return newAnnotations; const ids = []; const data = {}; oldAnnotations.forEach((a) => { ids.push(a.id); data[a.id] = a; }); newAnnotations.forEach((a) => { if (ids.indexOf(a.id) !== -1) { data[a.id] = a; } else { ids.push(a.id); data[a.id] = a; } }); return ids.map(id => data[id]); };
Array based
const normalizeLiveUpdateData = ( newAnnotations, oldAnnotations) => { if (!oldAnnotations) return newAnnotations; let normalizedAnnotations = oldAnnotations; newAnnotations.forEach((newAnnotation) => { const existingAnnotation = oldAnnotations.find((oldAnnotation) => oldAnnotation.id === newAnnotation.id); if (existingAnnotation) { normalizedAnnotations = normalizedAnnotations.map(obj => newAnnotations.find(o => o.id === obj.id) || obj); } else { normalizedAnnotations.push(newAnnotation); } }); return normalizedAnnotations; };

Run results for: Testing array normalizastion

Object based

Array based