Run results for: Object.assign vs spread operator vs property accessor 2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.2 Safari/605.1.15

Browser: Safari 16

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Script Preparation code:

var arr = [...Array(10).keys()];
var alphabet = [...'abcdefghijklmnopqrstuvwxyz'];

Tests:

Object.assign
arr.reduce((acc, cur) => Object.assign(acc, { [alphabet[cur]]: cur }), {});
spread operator
arr.reduce((acc, cur) => ({ ...acc, [alphabet[cur]]: cur }), {});
property accessor
arr.reduce((acc, cur) => { acc[alphabet[cur]] = cur; return acc; }, {});
property accessor 2
arr.reduce((acc, cur) => { return (acc[alphabet[cur]] = cur); }, {});