SMRTR ProgrammingMay 17, 2026Hacker News

Fastconstmap: Fast, immutable, compact map from strings to int64 for Python

SMRTR summary

fastconstmap is a Python/C library that creates an immutable, ultra-fast string-to-int64 lookup map using a binary fuse filter. It uses ~9 bytes per key, resolves lookups with minimal operations, and supports zero-copy cross-process shared memory.

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