Andrew Healey • 8/13/2025

Counting Words at SIMD Speed

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This article details a performance optimization journey for counting words in a text file. It starts with a slow Python implementation, improves it using regex, ports the logic to C for a significant speedup, and finally leverages ARM NEON SIMD instructions and multithreading to achieve the fastest possible execution times, with detailed benchmarks and code analysis.

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#performance optimization #low-level programming #c
Counting Words at SIMD Speed

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