How Do HashMaps Work Under the Hood? HashMaps are…
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How Do HashMaps Work Under the Hood?
HashMaps are incredibly convenient, but treating them like a magical black box can make it easy to overlook where their performance comes from.
In this article, I explain how HashMaps work using a simple implementation in Rust. I go through hash collisions and linear probing, why primary clustering hurts performance, load factors, resizing, and more.
The implementation is intentionally simplified, but it gives a good picture of what's actually happening underneath a HashMap.
Let me know your thoughts or any feedback you have!
All writing, illustrations, and code are my own. AI was used to clean up wording and catch grammatical mistakes.
#technology #dev #programming
source
HashMaps are incredibly convenient, but treating them like a magical black box can make it easy to overlook where their performance comes from.
In this article, I explain how HashMaps work using a simple implementation in Rust. I go through hash collisions and linear probing, why primary clustering hurts performance, load factors, resizing, and more.
The implementation is intentionally simplified, but it gives a good picture of what's actually happening underneath a HashMap.
Let me know your thoughts or any feedback you have!
All writing, illustrations, and code are my own. AI was used to clean up wording and catch grammatical mistakes.
#technology #dev #programming
source
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