Run results for: reduce me test 000009

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.164 Safari/537.36

Browser: Chrome 91

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
reduce spread	607057.8 Ops/sec
reduce 1	862459.0 Ops/sec

Script Preparation code:

var array = [{items: ['banana', 'jesus', 1212312, 2, 4, 'б', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'sausage', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg']},
             {items: ['banana', 'jesus', 1212312, 2, 4, 'б', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'sausage', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg']},
             {items: ['banana', 'jesus', 1212312, 2, 4, 'б', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'sausage', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg', '112312312', 'dsdsdsds', 'sdsdsdsd', 'ergergergerg']}]

Tests:

reduce spread
array.reduce((acc, {items}) => { return [...acc, ...items.map((item) => item)]; }, []);
reduce 1
array.reduce((acc, {items}) => { const preparedItems = items.map((item) => { return {item}; }) acc.push(...preparedItems); return acc; }, []);

Run results for: reduce me test 000009

reduce spread

reduce 1