From 46392366b3813b74b3485759a0dcd01a74e8a3a6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Randy=20D=C3=B6ring?=
 <30527984+radoering@users.noreply.github.com>
Date: Sun, 19 Feb 2023 14:46:47 +0100
Subject: [PATCH] performance: cache parsed constraints and versions

---
 src/poetry/core/constraints/generic/parser.py | 2 ++
 src/poetry/core/constraints/version/parser.py | 2 ++
 src/poetry/core/version/pep440/parser.py      | 4 +++-
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/poetry/core/constraints/generic/parser.py b/src/poetry/core/constraints/generic/parser.py
index abfba8eb5..9b5185385 100644
--- a/src/poetry/core/constraints/generic/parser.py
+++ b/src/poetry/core/constraints/generic/parser.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import functools
 import re
 
 from typing import TYPE_CHECKING
@@ -17,6 +18,7 @@
 BASIC_CONSTRAINT = re.compile(r"^(!?==?)?\s*([^\s]+?)\s*$")
 
 
+@functools.lru_cache(maxsize=None)
 def parse_constraint(constraints: str) -> BaseConstraint:
     if constraints == "*":
         return AnyConstraint()
diff --git a/src/poetry/core/constraints/version/parser.py b/src/poetry/core/constraints/version/parser.py
index 118a78cc3..86d59f649 100644
--- a/src/poetry/core/constraints/version/parser.py
+++ b/src/poetry/core/constraints/version/parser.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import functools
 import re
 
 from typing import TYPE_CHECKING
@@ -12,6 +13,7 @@
     from poetry.core.constraints.version.version_constraint import VersionConstraint
 
 
+@functools.lru_cache(maxsize=None)
 def parse_constraint(constraints: str) -> VersionConstraint:
     if constraints == "*":
         from poetry.core.constraints.version.version_range import VersionRange
diff --git a/src/poetry/core/version/pep440/parser.py b/src/poetry/core/version/pep440/parser.py
index 11fae074d..6aa99cf24 100644
--- a/src/poetry/core/version/pep440/parser.py
+++ b/src/poetry/core/version/pep440/parser.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import functools
 import re
 
 from typing import TYPE_CHECKING
@@ -63,6 +64,7 @@ def _get_local(cls, match: Match[str] | None) -> LocalSegmentType | None:
         )
 
     @classmethod
+    @functools.lru_cache(maxsize=None)
     def parse(cls, value: str, version_class: type[T]) -> T:
         match = cls._regex.search(value) if value else None
         if not match:
@@ -80,4 +82,4 @@ def parse(cls, value: str, version_class: type[T]) -> T:
 
 
 def parse_pep440(value: str, version_class: type[T]) -> T:
-    return PEP440Parser.parse(value, version_class)
+    return PEP440Parser.parse(value, version_class)  # type: ignore[arg-type]