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> If you're doing complex transforms over hundreds of GBs of data-

It's not always about giant datasets. Latency matters too for software that is run frequently by users.

I maintain a code formatter. In a typical invocation, it's processing only a few hundred kilobytes of input data. But it is invoked every time a user hits control-S, thousands of times a day. If I make it a few hundred milliseconds slower, it materially impacts their flow and productivity.

> Faster languages cannot fix polynomial or above complexity issues.

This is true. But once you have fixed all of your algorithmic issues, if your language is slow, you're completely stuck at that point. You have hit a performance ceiling.

Personally, I would rather work in a language where that ceiling is higher than it is in JavaScript.



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