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Apply functools.lru_cache to RegexFSM to Improve CFGFSM performance #621

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2 changes: 2 additions & 0 deletions outlines/fsm/fsm.py
Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
import functools
from typing import TYPE_CHECKING, List, NewType, Protocol, Tuple

import interegular
Expand Down Expand Up @@ -88,6 +89,7 @@ def copy(self) -> "StopAtEosFSM":
return self


@functools.lru_cache(maxsize=1024)
class RegexFSM(FSM):
"""FSM to generate text that is in the language of a regular expression."""

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