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Discussion on: Finding And Fixing Node.js Memory Leaks: A Practical Guide

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Gergő Móricz

Reading and writing to the disk comes with a cost, so do other API calls or database requests.

Async writeFile?

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Kmaschta Author

You're right, it's better! But it will never be as fast as writing in memory.

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Gergő Móricz

Explanation for people who are new to JS: writeFile is async, a.k.a. it doesn’t leave the execution waiting for the file to be written.