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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=628141" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:150.0) Gecko/20100101 Firefox/150.0
Browser:
Firefox 150
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
3 months ago
boring
119.4M/s
Object.assign
37.0M/s
spread
31.2M/s
View exact numbers
Test name
Executions per second
✓
boring
119,441,104 Ops/sec
Object.assign
36,966,304 Ops/sec
spread
31,165,694 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" });