Here, Far takes an unusually long time to start up (3 seconds), every time. Process Monitor shows that it loads its db files for 400ms, then proceeds to hammer HKCR\CLSID, HKCU\Software\Classes\CLSID and HKCR\Interface for 2500ms.
After downloading the pdb, the Stack view shows the following stack trace:
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...
13 shdocvw.dll Ordinal153 + 0x2a3d
...
16 ntdll.dll LdrLoadDll + 0x15e
17 kernel32.dll FindResourceExW + 0x151
...
34 ole32.dll CoCreateInstance + 0x17b
35 Far.exe taskbar::taskbar + 0x50, c:\src\unicode_far\taskbar.cpp(48)
36 Far.exe Taskbar + 0x46, c:\src\unicode_far\taskbar.cpp(41)
37 Far.exe PluginManager::LoadPlugins + 0x49, c:\src\unicode_far\plugins.cpp(393)
38 Far.exe ControlObject::Init + 0x19c, c:\src\unicode_far\ctrlobj.cpp(92)
39 Far.exe MainProcess + 0x2c1, c:\src\unicode_far\main.cpp(219)
40 Far.exe mainImpl + 0x1183, c:\src\unicode_far\main.cpp(767)
41 Far.exe wmain_seh + 0xa0, c:\src\unicode_far\main.cpp(797)
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CoCreateInstance(CLSID_TaskbarList, nullptr, CLSCTX_INPROC_SERVER, IID_ITaskbarList3, IID_PPV_ARGS_Helper(&ptr_setter(mTaskbarList)));