But also there is some problem with GTDebugger which talk with full stack items instead of visible ones. It slowdown opening on big stack (which is usual for recursion cases).��
To see problem just open in browser Context>>sender and put counter on sender variable (from suggestion menu). Also disable stack logging by "DebugSession logDebuggerStackToFile: false".
Now execute "1 recursionTest" from workspace and after 3 seconds press cmd+.. You will see 11610 calls of "context sender". Interesting that with SpecDebugger it is just 42 calls.