The FAH threads are definitely running at Idle (4) priority. Any nothing else on the system shows this kind of slowness so I doubt it's a system issue.

I looked at it a little more closely today and discovered that cmpro is spending the vast majority of it's time in one of two calls to SleepEx at offsets 0x14017e84b and 0x140122d6b. Hope that helps.

Edit: Apparently my edit didn't go through the first time, here are a couple of full call stacks, the first case is always through the call at d50:

> ntdll.dll!0000000077175dba()
[Frames below may be incorrect and/or missing, no symbols loaded for ntdll.dll]
kernel32.dll!0000000076f5cd18()
cmpro64.exe!000000014017e84b()
cmpro64.exe!0000000140122d50()
cmpro64.exe!0000000140153766()
cmpro64.exe!0000000140170206()
cmpro64.exe!00000001401755a3()
cmpro64.exe!0000000140179973()
cmpro64.exe!00000001400672c0()
cmpro64.exe!0000000140067500()
cmpro64.exe!0000000140065d2a()
cmpro64.exe!000000014006f584()
cmpro64.exe!0000000140070393()
cmpro64.exe!000000014006b688()
cmpro64.exe!000000014006e616()
cmpro64.exe!000000014006e6d1()
user32.dll!000000007707d24a()
user32.dll!000000007707af05()
user32.dll!000000007707af9d()
comctl32.dll!000007fefc4b71cb()
comctl32.dll!000007fefc4badce()
user32.dll!000000007707d24a()
user32.dll!000000007707d80c()
user32.dll!000000007709f4e7()
cmpro64.exe!000000014006b538()
cmpro64.exe!000000014006b6a0()
cmpro64.exe!000000014006e616()
cmpro64.exe!000000014006e6d1()
user32.dll!000000007707d24a()
user32.dll!000000007707d39e()
user32.dll!000000007707cac0()
user32.dll!00000000770afb4a()
cmpro64.exe!0000000140071ea4()
cmpro64.exe!000000014006bba0()
cmpro64.exe!0000000140065ceb()
cmpro64.exe!000000014012235c()
cmpro64.exe!000000014006e166()
cmpro64.exe!0000000140067def()
cmpro64.exe!0000000140067e4f()
cmpro64.exe!00000001400680c6()
cmpro64.exe!000000014006810b()
cmpro64.exe!000000014006d766()
cmpro64.exe!000000014006661a()
cmpro64.exe!00000001401f5141()
cmpro64.exe!00000001401f5537()
cmpro64.exe!00000001400672c0()
cmpro64.exe!0000000140067500()
cmpro64.exe!0000000140065d2a()
cmpro64.exe!000000014006f584()
cmpro64.exe!0000000140070393()
cmpro64.exe!000000014006b688()
cmpro64.exe!000000014006e616()
cmpro64.exe!000000014006e6d1()
user32.dll!000000007707d24a()
user32.dll!000000007707af05()
user32.dll!000000007707af9d()
comctl32.dll!000007fefc4b71cb()
comctl32.dll!000007fefc4badce()
user32.dll!000000007707d24a()
user32.dll!000000007707d80c()
user32.dll!000000007709f4e7()
cmpro64.exe!000000014006b538()
cmpro64.exe!000000014006b6a0()
cmpro64.exe!000000014006e616()
cmpro64.exe!000000014006e6d1()
user32.dll!000000007707d24a()
user32.dll!000000007707d39e()
user32.dll!000000007707cac0()
user32.dll!00000000770afb4a()
cmpro64.exe!0000000140071ea4()
cmpro64.exe!000000014006bba0()
cmpro64.exe!0000000140065ceb()
cmpro64.exe!00000001401f06ae()
cmpro64.exe!000000014006e166()
cmpro64.exe!0000000140067def()
cmpro64.exe!0000000140067e4f()
cmpro64.exe!00000001400680c6()
cmpro64.exe!000000014006810b()
cmpro64.exe!000000014006d766()
cmpro64.exe!000000014006661a()
cmpro64.exe!00000001401fcf1d()
cmpro64.exe!00000001401fd350()
cmpro64.exe!00000001400a1fbd()
cmpro64.exe!0000000140086569()
kernel32.dll!0000000076f5495d()
ntdll.dll!0000000077158791()

--

> ntdll.dll!0000000077175dba()
[Frames below may be incorrect and/or missing, no symbols loaded for ntdll.dll]
kernel32.dll!0000000076f5cd18()
cmpro64.exe!000000014017e84b()
cmpro64.exe!0000000140122d50()
cmpro64.exe!0000000140156487()
cmpro64.exe!000000014016c306()
cmpro64.exe!000000014016e09f()
cmpro64.exe!000000014017245d()
cmpro64.exe!00000001401755a3()
cmpro64.exe!0000000140179973()
cmpro64.exe!00000001400672c0()
cmpro64.exe!0000000140067500()
cmpro64.exe!0000000140065d2a()
cmpro64.exe!000000014006f584()
cmpro64.exe!0000000140070393()
cmpro64.exe!000000014006b688()
cmpro64.exe!000000014006e616()
cmpro64.exe!000000014006e6d1()
user32.dll!000000007707d24a()
user32.dll!000000007707af05()
user32.dll!000000007707af9d()
comctl32.dll!000007fefc4b71cb()
comctl32.dll!000007fefc4badce()
user32.dll!000000007707d24a()
user32.dll!000000007707d80c()
user32.dll!000000007709f4e7()
cmpro64.exe!000000014006b538()
cmpro64.exe!000000014006b6a0()
cmpro64.exe!000000014006e616()
cmpro64.exe!000000014006e6d1()
user32.dll!000000007707d24a()
user32.dll!000000007707d39e()
user32.dll!000000007707cac0()
user32.dll!00000000770afb4a()
cmpro64.exe!0000000140071ea4()
cmpro64.exe!000000014006bba0()
cmpro64.exe!0000000140065ceb()
cmpro64.exe!000000014012235c()
cmpro64.exe!000000014006e166()
cmpro64.exe!0000000140067def()
cmpro64.exe!0000000140067e4f()
cmpro64.exe!00000001400680c6()
cmpro64.exe!000000014006810b()
cmpro64.exe!000000014006d766()
cmpro64.exe!000000014006661a()
cmpro64.exe!00000001401f5141()
cmpro64.exe!00000001401f5537()
cmpro64.exe!00000001400672c0()
cmpro64.exe!0000000140067500()
cmpro64.exe!0000000140065d2a()
cmpro64.exe!000000014006f584()
cmpro64.exe!0000000140070393()
cmpro64.exe!000000014006b688()
cmpro64.exe!000000014006e616()
cmpro64.exe!000000014006e6d1()
user32.dll!000000007707d24a()
user32.dll!000000007707af05()
user32.dll!000000007707af9d()
comctl32.dll!000007fefc4b71cb()
comctl32.dll!000007fefc4badce()
user32.dll!000000007707d24a()
user32.dll!000000007707d80c()
user32.dll!000000007709f4e7()
cmpro64.exe!000000014006b538()
cmpro64.exe!000000014006b6a0()
cmpro64.exe!000000014006e616()
cmpro64.exe!000000014006e6d1()
user32.dll!000000007707d24a()
user32.dll!000000007707d39e()
user32.dll!000000007707cac0()
user32.dll!00000000770afb4a()
cmpro64.exe!0000000140071ea4()
cmpro64.exe!000000014006bba0()
cmpro64.exe!0000000140065ceb()
cmpro64.exe!00000001401f06ae()
cmpro64.exe!000000014006e166()
cmpro64.exe!0000000140067def()
cmpro64.exe!0000000140067e4f()
cmpro64.exe!00000001400680c6()
cmpro64.exe!000000014006810b()
cmpro64.exe!000000014006d766()
cmpro64.exe!000000014006661a()
cmpro64.exe!00000001401fcf1d()
cmpro64.exe!00000001401fd350()
cmpro64.exe!00000001400a1fbd()
cmpro64.exe!0000000140086569()
kernel32.dll!0000000076f5495d()
ntdll.dll!0000000077158791()