Run results for: new Set from Map<number, number[]> - for..of vs Array.from(...).flat();

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser: Chrome 136

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 11 months ago

Test name	Executions per second
for..of	665522.1 Ops/sec
Array.from().flat()	508007.9 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

const data = new Map([
  [100, [101, 102, 103, 104, 105]],
  [200, [201, 202, 203, 204, 205]],
  [300, [301, 302, 303, 304, 305]],
  [400, [401, 402, 403, 404, 405]],
  [500, [501, 502, 503, 504, 505]],
]);

Tests:

for..of
const set = new Set(); for (const ids of data.values()) { for (const id of ids) { set.add(id); } }
Array.from().flat()
const set = new Set(Array.from(data.values()).flat());

Run results for: new Set from Map<number, number[]> - for..of vs Array.from(...).flat();

Comparing set creation from nested arrays using

for..of

Array.from().flat()