Benchmark: array to obj by key value advanced

Tests:

one liner
const peopleArray = [ { id: 123, name: "dave", age: 23 }, { id: 456, name: "chris", age: 23 }, { id: 789, name: "bob", age: 23 }, { id: 101, name: "tom", age: 23 }, { id: 102, name: "tim", age: 23 } ] const arrayToObject = (arr, keyField) => Object.assign({}, ...arr.map(item => ({[item[keyField]]: item}))) const peopleObject = arrayToObject(peopleArray, "id")
reduced
const peopleArray = [ { id: 123, name: "dave", age: 23 }, { id: 456, name: "chris", age: 23 }, { id: 789, name: "bob", age: 23 }, { id: 101, name: "tom", age: 23 }, { id: 102, name: "tim", age: 23 } ] const arrayToObject = (array, keyField) => array.reduce((obj, item) => { obj[item[keyField]] = item return obj }, {}) const peopleObject = arrayToObject(peopleArray, "id")
reduced clean
const peopleArray = [ { id: 123, name: "dave", age: 23 }, { id: 456, name: "chris", age: 23 }, { id: 789, name: "bob", age: 23 }, { id: 101, name: "tom", age: 23 }, { id: 102, name: "tim", age: 23 } ] const arrayToObject = (array, keyField) => array.reduce((acc, curr) => ({ [curr[keyField]]: curr, ...acc }), {}) const peopleObject = arrayToObject(peopleArray, "id")

Rendered benchmark preparation results:

Previous results

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Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:72.0) Gecko/20100101 Firefox/72.0

Browser/OS: Firefox 72 on Mac OS X 10.15

array to obj by key value advanced (version: 0)