diff --git a/CHANGELOG.md b/CHANGELOG.md
index c126bb64d5..9e3a7756b6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Improvements
 
 - Speed up HTTP tracking for multiple requests in parallel (#4366)
+- Slightly speed up SentryInAppLogic (#4370)
 
 ## 8.37.0-beta.1
 
diff --git a/Sources/Sentry/SentryInAppLogic.m b/Sources/Sentry/SentryInAppLogic.m
index 1b5ac288b2..4482120590 100644
--- a/Sources/Sentry/SentryInAppLogic.m
+++ b/Sources/Sentry/SentryInAppLogic.m
@@ -1,4 +1,5 @@
 #import "SentryInAppLogic.h"
+#import "SentryLog.h"
 #import <Foundation/Foundation.h>
 #import <objc/runtime.h>
 
@@ -10,8 +11,19 @@ - (instancetype)initWithInAppIncludes:(NSArray<NSString *> *)inAppIncludes
                         inAppExcludes:(NSArray<NSString *> *)inAppExcludes
 {
     if (self = [super init]) {
-        _inAppIncludes = inAppIncludes;
-        _inAppExcludes = inAppExcludes;
+        NSMutableArray<NSString *> *includes =
+            [[NSMutableArray alloc] initWithCapacity:inAppIncludes.count];
+        for (NSString *include in inAppIncludes) {
+            [includes addObject:include.lowercaseString];
+        }
+        _inAppIncludes = includes;
+
+        NSMutableArray<NSString *> *excludes =
+            [[NSMutableArray alloc] initWithCapacity:inAppExcludes.count];
+        for (NSString *exclude in inAppExcludes) {
+            [excludes addObject:exclude.lowercaseString];
+        }
+        _inAppExcludes = excludes;
     }
 
     return self;
@@ -23,13 +35,17 @@ - (BOOL)isInApp:(nullable NSString *)imageName
         return NO;
     }
 
+    NSString *imageNameLastPathComponent = imageName.lastPathComponent.lowercaseString;
+
     for (NSString *inAppInclude in self.inAppIncludes) {
-        if ([SentryInAppLogic isImageNameInApp:imageName inAppInclude:inAppInclude])
+        if ([SentryInAppLogic isImageNameLastPathComponentInApp:imageNameLastPathComponent
+                                                   inAppInclude:inAppInclude])
+
             return YES;
     }
 
-    for (NSString *inAppExlude in self.inAppExcludes) {
-        if ([imageName.lastPathComponent.lowercaseString hasPrefix:inAppExlude.lowercaseString])
+    for (NSString *inAppExclude in self.inAppExcludes) {
+        if ([imageNameLastPathComponent hasPrefix:inAppExclude])
             return NO;
     }
 
@@ -48,7 +64,15 @@ - (BOOL)isClassInApp:(Class)targetClass
 
 + (BOOL)isImageNameInApp:(NSString *)imageName inAppInclude:(NSString *)inAppInclude
 {
-    return [imageName.lastPathComponent.lowercaseString hasPrefix:inAppInclude.lowercaseString];
+    return [SentryInAppLogic
+        isImageNameLastPathComponentInApp:imageName.lastPathComponent.lowercaseString
+                             inAppInclude:inAppInclude];
+}
+
++ (BOOL)isImageNameLastPathComponentInApp:(NSString *)imageNameLastPathComponent
+                             inAppInclude:(NSString *)inAppInclude
+{
+    return [imageNameLastPathComponent hasPrefix:inAppInclude];
 }
 
 @end