Using Top Functions Mode in Instruments to Quickly Find the Slowest Code

In Xcode 26.4 Apple added a Top Functions mode to the Time Profiler and CPU Profiler instruments to help you quickly find the functions where your app spends the most time. This article explains the Top Functions mode. If you are new to time profiling with Instruments, read the following article: Find the Slow Spots in Your Code with the CPU Profiler Instrument The article covers the CPU Profiler…