Run results for: Contains, indexOf

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.78 Safari/537.36

Browser: Chrome 60

Operating system: Windows

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
includes	4790.4 Ops/sec
indexOf	6070.4 Ops/sec

Script Preparation code:

var list = [...Array(1000).keys()].map((index) => {return {id: index, name: `PRODUCT_${index}`}});
var newItems = [{id: 50, name: 'CUST_50'}, {id: 412, name: 'CUST_412'}];
var newItemIds = newItems.map((item) => item.id);

Tests:

includes
list.filter((item) => { return !newItemIds.includes(item.id); });
indexOf
list.filter((item) => { return newItemIds.indexOf(item.id) === -1; });

Run results for: Contains, indexOf

includes

indexOf