diff --git a/src/fuzz_introspector/datatypes/project_profile.py b/src/fuzz_introspector/datatypes/project_profile.py
index 64e529fe5..6dfda72f9 100644
--- a/src/fuzz_introspector/datatypes/project_profile.py
+++ b/src/fuzz_introspector/datatypes/project_profile.py
@@ -144,7 +144,8 @@ def __init__(self, profiles: List[fuzzer_profile.FuzzerProfile],
         # Add all functions from the various profiles into the merged profile. Don't
         # add duplicates
         logger.info("Creating all_functions dictionary")
-        excluded_functions = {"sanitizer", "llvm", "LLVMFuzzerTestOneInput"}
+        excluded_functions_tuple = ("sanitizer", "llvm",
+                                    "LLVMFuzzerTestOneInput")
         for profile in profiles:
             # Handles jvm constructors
             for fd in profile.all_class_constructors.values():
@@ -158,9 +159,14 @@ def __init__(self, profiles: List[fuzzer_profile.FuzzerProfile],
 
             # Handles normal functions
             for fd in profile.all_class_functions.values():
+                # Performance Optimization: Avoid any() with generator for O(N) substring checks.
                 # continue if the function is to be excluded
-                if any(to_exclude in fd.function_name
-                       for to_exclude in excluded_functions):
+                to_exclude = False
+                for ex in excluded_functions_tuple:
+                    if ex in fd.function_name:
+                        to_exclude = True
+                        break
+                if to_exclude:
                     continue
 
                 current_fd = self.all_functions.get(fd.function_name)