[Rotten194]

isn't that hideously inefficient? you're making a new object each iteration.

[Touche]

But purity.

[djfm]

it's very unlikely this is going to be the bottleneck in your application

[mintplant]

I wouldn't be so quick to write that off as a performance concern. Creating tons of unnecessary objects is JavaScript's equivalent to programming without regard for cache locality at a lower level, due to the way the JITs work.

[Touche]

It's very unlikely you'll get any benefit from doing it the inefficient way either. Does eslint not support "ignore this part" comments?

[Prefinem]

Yes it does

// eslint-disable-line your-rule-to-ignore