Detach
Applies to: 
Visual Studio 
Visual Studio for Mac
Note
This article applies to Visual Studio 2017. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here
The VSPerfCmd.exe Detach option disconnects the profiler from the specified processes or all processes if none are specified. Profiling must have been initialized by using the sampling method.
Profiling that was started with either the Launch or the Attach options can be disconnected with Detach. The profiler can be reattached by using subsequent Attach commands.
Detach does not close the profiling data file. Use the Shutdown option to end profiling and close the data file.
Note
If the Start option was specified with the Crosssession option, any calls to VSPerfCmd /Attach or to VSPerfCmd /Detach must also specify Crosssession.
Syntax
VSPerfCmd.exe /Detach[:PIDs|ProcessNames]
Parameters
PIDs|ProcessNames
PID - The numeric system identifer of one or more processes.
ProcessNames - the name of the process. If multiple instances of the named process are running, results are unpredictable.
Separate multiple processes with commas.
If no process is specified, the profiler is detached from all profiled process.
Valid options
The following VSPerfCmd options can be combined with the Attach option on a single command line.
Crosssession Enables profiling applications in sessions other than the logon session. Required if the Start option was specified with the Crosssession option.
Example
In this example, the Detach command suspends profiling and the Shutdown command closes the profiler data file.
VSPerfCmd.exe /Start:Sample /Output:TestApp.exe.vsp
VSPerfCmd.exe /Launch:TestApp.exe
;REM Excercise the application
VSPerfCmd.exe /Detach
VSPerfCmd.exe /Shutdown