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Python sets and dictionaries can have quadratic-time performance

Hacker News Top ↗ · 2026-09-08 Cached

The article explains that Python's dict and set data structures, often assumed to be O(1), can exhibit quadratic-time performance in scenarios involving hash collisions and memory hierarchy effects.

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Compile-Time Improvements in LLVM 23

Lobsters Hottest ↗ · 2026-08-22 Cached

LLVM 23 delivers a 6.75% reduction in compile-time for -O3 builds, driven by key improvements in ADT hash maps, sets, and other components.

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Golang Maps: how Swiss Tables replaced the old bucket design

Hacker News Top ↗ · 2026-07-24 Cached

Go 1.24 replaces the old bucket-based map implementation with a Swiss Table-inspired design, improving cache locality, reducing pointer chasing, and boosting performance in many workloads.

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