Benchmark: 111111111111111 - MeasureThat.net

Tests:

222222222222222222222
const currency = [{ usd: 5 }, { uah: 10 }, { usd: 3 }]; // {ysd:8, hrn:10} const result = currency.reduce((res, item) => { for (const [key, value] of Object.entries(item)) { !res[key] ? (res[key] = value) : (res[key] = res[key] + value); } return res; }, {});
3333333333333333333
const currency = [{ usd: 5 }, { uah: 10 }, { usd: 3 }]; // {ysd:8, hrn:10} const merge = (data) => { const res = {}; data.forEach((item) => { for (let [key, value] of Object.entries(item)) { !res[key] ? (res[key] = value) : (res[key] += value); } }); return res; };

Rendered benchmark preparation results:

Previous results

Test case name	Result
222222222222222222222
3333333333333333333

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.2 Safari/605.1.15

Browser/OS: Safari 13 on Mac OS X 10.14.6

Test name	Executions per second
222222222222222222222	819302.8 Ops/sec
3333333333333333333	35480090.0 Ops/sec

111111111111111 (version: 0)