diff --git a/lib/crewai/src/crewai/utilities/string_utils.py b/lib/crewai/src/crewai/utilities/string_utils.py
index fc5d12a4b..a817f1ffb 100644
--- a/lib/crewai/src/crewai/utilities/string_utils.py
+++ b/lib/crewai/src/crewai/utilities/string_utils.py
@@ -2,6 +2,7 @@
 # https://github.com/un33k/python-slugify
 # MIT License
 
+import functools
 import hashlib
 import re
 from typing import Any, Final
@@ -13,11 +14,15 @@ _QUOTE_PATTERN: Final[re.Pattern[str]] = re.compile(r"[\'\"]+")
 _CAMEL_LOWER_UPPER: Final[re.Pattern[str]] = re.compile(r"([a-z])([A-Z])")
 _CAMEL_UPPER_LOWER: Final[re.Pattern[str]] = re.compile(r"([A-Z]+)([A-Z][a-z])")
 _DISALLOWED_CHARS_PATTERN: Final[re.Pattern[str]] = re.compile(r"[^a-zA-Z0-9]+")
-_DUPLICATE_SEPARATOR_PATTERN: Final[re.Pattern[str]] = re.compile(r"[-_]{2,}")
 _DUPLICATE_UNDERSCORE_PATTERN: Final[re.Pattern[str]] = re.compile(r"_+")
 _MAX_TOOL_NAME_LENGTH: Final[int] = 64
 
 
+@functools.lru_cache(maxsize=8)
+def _duplicate_separator_pattern(separator: str) -> re.Pattern[str]:
+    return re.compile(f"(?:{re.escape(separator)}){{2,}}")
+
+
 def sanitize_tool_name(name: str, max_length: int = _MAX_TOOL_NAME_LENGTH) -> str:
     """Sanitize tool name for LLM provider compatibility.
 
@@ -67,8 +72,7 @@ def slugify(text: str, separator: str = "_") -> str:
     text = text.lower()
     text = _QUOTE_PATTERN.sub("", text)
     text = _DISALLOWED_CHARS_PATTERN.sub(separator, text)
-    escaped_sep = re.escape(separator)
-    text = re.sub(f"(?:{escaped_sep}){{2,}}", separator, text)
+    text = _duplicate_separator_pattern(separator).sub(separator, text)
     return text.strip(separator)