Run results for: setting localStorage

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:146.0) Gecko/20100101 Firefox/146.0

Browser: Firefox 146

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 8 months ago

Benchmark engine: Benchmark.js

setting localStorage unconditionally (simulating 1 React rerender after mount)

781K/s

setting localStorage conditionally (simulating 1 React rerender after mount)

468K/s

View exact numbers

Test name	Executions per second
✓ setting localStorage unconditionally (simulating 1 React rerender after mount)	780,764 Ops/sec
setting localStorage conditionally (simulating 1 React rerender after mount)	467,961 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

//constant
window.itemOptions = {
	'1': '1',
  	'2': '2',
  	'3': '3',
  	'4': '4',
};

//example object
window.stateObject = {
	item1: '00000',
  	item2: '50',
  	item3: [],
  	item4: [window.itemOptions['1']],
  	item5: [],
};

localStorage.setItem('stateObject', JSON.stringify(window.stateObject));

Tests:

setting localStorage unconditionally (simulating 1 React rerender after mount)
localStorage.setItem('stateObject', JSON.stringify(window.stateObject)); localStorage.setItem('stateObject', JSON.stringify(window.stateObject));
setting localStorage conditionally (simulating 1 React rerender after mount)
const storedState = JSON.parse(localStorage.getItem('stateObject')); if (!_.isEqual(window.stateObject, storedState)) { localStorage.setItem('stateObject', JSON.stringify(window.stateObject)); } if (!_.isEqual(window.stateObject, storedState)) { localStorage.setItem('stateObject', JSON.stringify(window.stateObject)); }

Run results for: setting localStorage

testing efficiency of setting localStorage with and without conditional deep equals check

setting localStorage unconditionally (simulating 1 React rerender after mount)

setting localStorage conditionally (simulating 1 React rerender after mount)