Unit tests run 2x slower when FCC is installed (not enabled) in Visual Studio 2026 #550
Description
This may be an issue for the Visual Studio team to fix, I have raised it here: https://developercommunity.visualstudio.com/t/Visual-Studio-2026-Test-Runner-running-t/10999162#T-N10999319-N11001950
I just wanted to comment here for awareness too.
When running unit tests in VS2022 with the FCC extension installed, the tests run in approximately 6-7 minutes. If the FCC extension is enabled/set to collect code coverage, that time is roughly that same. The code coverage report appears to process after the unit tests run and takes 10 or so minutes.
When running unit tests in VS2026 with the FCC extension installed, the tests run in approximately 12-14 minutes (around double the time). This is when the FCC extension is set to not collect code coverage. If I uninstall the extension, the tests take 6-7 minutes to run,