You can use different test packages and include / exclude what you want.
I mean creating my own custom test targets (packages) and using the Xcode Test Navigator.
So, for example, creating the target MyUnitBundleTests and MyPerformanceBundleTests . They would be two separate test "packages" where you decide to include / exclude classes, methods, etc.
The Test Navigator displays a hierarchical list of test packages and related classes, methods, etc. included in the project.
You can enable and disable test suites, classes, and methods selectively using Ctrl by clicking on items in the list of test navigation systems and selecting "Enable or Disable" from the context menu, thereby enabling or disabling elements in the circuit.
Testing with Xcode - Quick Start
Testing with Xcode - Performing Tests and Search Results
There are several additional interactive ways to run tests. Xcode runs tests based on which test targets are included and included in the schema. The test navigator allows you to directly control which goals, classes, and test methods are enabled, enabled, or disabled in the circuit without using the circuit editor.

Not sure if this is what you want, but this is the only option I can come up with for testing without going to the Schema Editor.
tymac
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