Released fastconstmap 0.11.0 with free-threaded Python support (3.13t / 3.14t).
This is a dev post classified by AGK Intelligence as Languages & runtimes (a launch), kept by the Dev Radar because it carries real work, not commentary.
Released fastconstmap 0.11.0 with free-threaded Python support (3.13t / 3.14t). It is an immutable map from strings to 64-bit integers using binary fuse filters. It uses about 9 bytes per key (18 if you want missing-key detection), one xxhash plus three array reads per lookup, and a batched API for even more speed. It is interoperable with the Go and Rust versions of the same structure. It will use massively less memory than the alternatives. Because the map is immutable after construction, lookups need no locking. The extension now declares it does not need the GIL, so on a free-threaded i
Posted by Daniel Lemire (38.7k followers) 2 days ago · 75 likes · 3.6k views · view the original post on X. Kept by the Dev Radar as Languages & runtimes. Tools mentioned: fastconstmap.
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