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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=617745" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36
Browser:
Chrome 140
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
8 months ago
Test name
Executions per second
boring
107117280.0 Ops/sec
spread
42101924.0 Ops/sec
Object.assign
34120324.0 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" });