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Run results for:
conditionally insert properties
https://www.reddit.com/r/javascript/comments/mrzrty/the_shortest_way_to_conditionally_insert/
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<iframe src="https://measurethat.net/Embed?id=628392" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
Browser:
Chrome 147
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 days ago
Test name
Executions per second
boring
92278216.0 Ops/sec
spread
33945252.0 Ops/sec
Object.assign
28818334.0 Ops/sec
Tests:
boring
const obj = { hello: "world" }; if (Math.random()>.5) { obj.foo = "bar"; }
spread
const obj = { hello: "world", ...Math.random()>.5 && { foo: "bar" } };
Object.assign
const obj = Object.assign({ hello: "world" }, Math.random()>.5 && { foo: "bar" });