################
 Free-threading
################

The extension holds no shared mutable state: inputs are immutable ``str`` objects, the lookup tables are read-only, and
each :class:`turbohtml.Tokenizer` owns its state machine, so tokenizers in different threads never contend. The
extension declares free-threading support and a per-interpreter GIL on interpreters new enough to honor those slots, so
it does not force the global lock back on under a free-threaded build. As with any stateful object, feeding one
tokenizer from several threads at once needs synchronization on the caller's side. See the `free-threading extension
guide <https://docs.python.org/3/howto/free-threading-extensions.html>`_.