• We fixed a bug that caused floating-point return values of profiled methods to become corrupted.
• The IIS profiling session has been reimplemented to use new IIS 10 features. It now only restarts the profiled application pools, rather than the entire IIS service.

• Upgraded the NProfiler codebase to .NET 9.
• Added a new Ribbon that can be switched to a simplified layout to save vertical screen space. You can do this using the small button on the right side of the screen.
• Enabled customization of the Ribbon Quick Access Toolbar.
• Enabled displaying "Time Self" and "Time With Children" of the currently selected method in the timeline. This allows you to analyze the activity of methods over time.
• Added a flame icon to hot paths in the call tree (the stack traces that took the most time).
• Added stack highlighting to the call tree, which highlights all ancestors of the selected call tree node.
• Replaced "Insignificant items" nodes in the call tree with regular nodes that can be collapsed again.
• Added a "Types" tab that shows performance data grouped by .NET types.
• Added an "Exceptions" tab that shows all thrown exceptions.
• Added a "View Exceptions" item to the context menu of call tree nodes and methods that have thrown exceptions, to display a list of these exceptions.
• Added a "Find All Throw Contexts" item to the context menu of exception items to display a list of all stack contexts in which an exception was thrown.
• Added a "Show in Call Tree" item to the context menu of exception context items, to view the context in the call tree to understand where the exception was thrown.
• Added a "Find All Calls" item to the context menu of call tree nodes and methods, to find all calls of a method. You can then jump from the displayed list back to the call tree via "Show in Call Tree" to see where a specific call happened.
• Added a dark mode.
• Fixed several bugs.
• Implemented many other small improvements.

• We fixed an issue that prevented online activation when using a proxy server.

• We have greatly optimized the profiler's tracing/instrumentation mode. Profiled applications now run 5 to 10 times faster.
• Profiler result files are now locked when opened so that they can no longer be accidentally deleted, which caused the user interface to crash in the past.
• Profiled applications no longer crash if the type information of a raised exception cannot be retrieved.

• Added offline activation for machines without an internet connection.
• The timeline now shows the activity of selected methods over time.
• Added a process search field to the attach-to-process session configurator.
• Items in the timeline legend now have the same order as those in the metrics selector, which makes them easier to scan.
• Fixed a bug that led to incorrect sizes of different popups, such as the thread selector or the timeline metric popup.

• Upgraded the profiler code base to .NET 8.
• Replaced all icons with modern vector icons for high DPI.
• Fixed some crashes when profiling .NET 8 applications.
• Improved some descriptions in the session configurator.
• Changed the syntax for specifying the namespaces to profile, so you must type less.
• Increased the auto-expand depth in the call tree from 16 to 100 levels so that you can see the most relevant methods more quickly.
• Changed the default sorting for the method list so that the most interesting methods are immediately at the top.
• Changed the decompilation of async and enumerator methods to show the actual code instead of syntactic sugar that doesn't match the profiling results.
• Simplified the license activation dialog.

• Fixes a UI crash in case of invalid IL offsets.
• Fixes a potential source of UI deadlocks.
• Fixes a crash related to invalid saved window settings.
• Clarifies some descriptions in the profiling session configurator.
• Improves logging.

• Fixes a source code document bug that occasionally crashes the user interface.
• Improves logging.

• Minor user interface improvements.

• Fixes a bug that causes the application to crash if a user tries to close a window while it is being closed.
• Hides the hit count in the code sequence statistics popup in sampling mode.
• Fixes issues with the option combo boxes in the session configurator.

• Fixes two bugs that occasionally crash the user interface.

• Adds a file association for *.nprof files.

NProfiler 5 is the new, completely rewritten version of NProfiler. It has a vastly improved user interface, considerably advanced overhead compensation, a better file format based on SQLite, and a much cleaner code base.