Run results for: intersect v1

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36 Edg/125.0.0.0

Browser: Chrome 125

Operating system: Windows

Device Platform: Desktop

Date tested: 3 months ago

Test name	Executions per second
naive compare	11.8 Ops/sec
some; swap and shorten len	8.6 Ops/sec
for; swap and shorten len	0.3 Ops/sec

Script Preparation code:

var watched = [];
var ignored = [];

for(let i = 0; i < 10000; i++){watched.push({programId:Math.random()});}
for(let i = 0; i < 10000; i++){ignored.push({programId:Math.random()});}

Tests:

naive compare
watched.filter(wObj => { return !ignored.some((iObj, ndx) => iObj.programId === wObj.programId); });
some; swap and shorten len
let ml = ignored.length -1; watched.filter(wObj => !ignored.some((iObj, ndx) => { if (iObj.programId === wObj.programId) { ignored[ndx].programId = ignored[ml--].programId; ignored.length = ml; return true; } return false; }) );
for; swap and shorten len
let ml = ignored.length -1; watched.filter(wObj => { for (let i = 0; i < ml; i++) { if (wObj.programId === ignored[i].programId) { ignored[i].programId = ignored[ml--].programId; return false; } } return true; });

Run results for: intersect v1

naive compare

some; swap and shorten len

for; swap and shorten len