SMRTR ProgrammingSep 16, 2025Dev.to

Stop Using parseInt - Here's Why It's Slowing You Down

SMRTR summary

JavaScript's parseInt slows code when misused for truncating numbers instead of converting strings to integers. Math.trunc() is a faster, clearer alternative that properly removes decimal portions and works with negative numbers, performing up to 5 times faster in benchmarks. While bitwise operators (| 0 or ~~) are alternatives, they have limitations with large numbers. Using the right tool improves code readability, efficiency, and maintainability, contributing to better development practices and software performance.

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