Reading and writing to the disk comes with a cost, so do other API calls or database requests.
Async writeFile?
You're right, it's better! But it will never be as fast as writing in memory.
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.
writeFile
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re: Finding And Fixing Node.js Memory Leaks: A Practical Guide VIEW POST
VIEW FULL DISCUSSIONAsync writeFile?
You're right, it's better! But it will never be as fast as writing in memory.
Explanation for people who are new to JS:
writeFileis async, a.k.a. it doesn’t leave the execution waiting for the file to be written.