perf: DebugStackTrace no longer creates a stack trace for dynamic methods

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+### Features
+- DebugStackTrace no longer creates a stack trace for dynamic methods, which should result in slightly better performance when capturing errors ([#4954](https://github.com/getsentry/sentry-dotnet/pull/4954))
+
 ### Fixes
 
 - The SDK now logs a `Warning` instead of an `Error` when being ratelimited ([#4927](https://github.com/getsentry/sentry-dotnet/pull/4927))

src/Sentry/Internal/DebugStackTrace.cs

@@ -532,14 +532,18 @@ private static void DemangleLambdaReturnType(SentryStackFrame frame)
                 return reader.Invoke(assemblyName);
             }
 
-            var assembly = options.FileSystem.OpenFileForReading(assemblyName);
-            return new PEReader(assembly);
+            if (options.FileSystem.FileExists(assemblyName))
+            {
+                var assembly = options.FileSystem.OpenFileForReading(assemblyName);
+                return new PEReader(assembly);
+            }
         }
-        catch (Exception)
+        catch
         {
-            assemblyName = null;
-            return null;
+            // Swallow and return null below
         }
+        assemblyName = null;
+        return null;
     }
 
     private int? AddManagedModuleDebugImage(Module module)