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Golang Maps: how Swiss Tables replaced the old bucket design


Go 1.24 replaces the old bucket-and-overflow map internals with a Swiss Table-inspired design to improve cache locality, lookup speed, and memory efficiency.

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Photo of Swiss Tables

Swiss Tables

Photo of old bucket design

old bucket design

Photo of Golang Maps

Golang Maps

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Swiss Tables

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Go's new map implementation in 1.24 is powered by Swiss Tables