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Performance benchmarks and optimization tips

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Making Ahnlich Faster with SIMD: A 4.7x Speedup Story

· 13 min read
Diretnan Domnan
Senior Systems Engineer @ Cloudflare
David Onuh
Senior Software Engineer @ Aleph Alpha

Vector databases power modern search, from finding similar images to semantic document retrieval. But there's a hidden performance bottleneck: calculating distances between millions of high-dimensional vectors requires billions of operations per query. In this post, I'll show you how we used SIMD (Single Instruction, Multiple Data) to make Ahnlich 4.7x faster at these calculations.

SIMD Optimization Hero