Today I Learned - Rocky Kev

TIL not using the delete keyword for performance issues

POSTED ON:

TAGS: javascript objects performance

The delete keyword is used to remove a property from an object.

Apparently, there is performance issues with delete with V8 Javascript Engine. Issue1 and issue2

It's faster to just declare it as undefined.

const object = {name:"Jane Doe", age:43};
object.age = undefined;

Via https://www.joyk.com/dig/detail/1594756891396192

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