Run results for: filter -> includes vs filter -> Set.has() vs populate Map v2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser: Chrome 122

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
filter -> includes	65671.7 Ops/sec
filter -> Set.has()	18387.1 Ops/sec
Populate Map	14809603.0 Ops/sec

Script Preparation code:

var books = Array.from({length: 1000}, (_, index) => ({id: index, mensionedIn: [{ids: [index, index + 1, index + 2, index + 3]}]}))
var bookMap = new Map();

books.forEach(book => {
  book.mensionedIn.forEach(mension => {
    mension.ids.forEach(id => {
      if (!bookMap.has(id)) {
        bookMap.set(id, []);
      }
      bookMap.get(id).push(book);
    });
  });
});

Tests:

filter -> includes
var getBooksWithIndex_1 = (index) => { return books.filter(book => book.mensionedIn.some(mensioned => mensioned.ids.includes(index))) } getBooksWithIndex_1(4) getBooksWithIndex_1(5)
filter -> Set.has()
const getBooksWithIndex_2 = (index) => { const bookIdSet = new Set([index]) return books.filter(book => book.mensionedIn.some(mensioned => mensioned.ids.some(bookIndex => bookIdSet.has(bookIndex)))) } getBooksWithIndex_2(4) getBooksWithIndex_2(5)
Populate Map
const getBooksWithIndex_3 = (index)=> { return bookMap.get(index); } getBooksWithIndex_3(4) getBooksWithIndex_3(5)

Run results for: filter -> includes vs filter -> Set.has() vs populate Map v2

filter -> includes

filter -> Set.has()

Populate Map