Windows 8.1 File System Performance Down Compared to Windows 7

Question

I have a good workstation and a fast SSD array as my boot volume. 
Ever since installing Windows 8.1 I have found the file system performance to be somewhat slower than that of Windows 7.
There's nothing wrong with my setup - in fact it runs as stably as it did under Windows 7 on the same hardware with a similar configuration. 
The NTFS file system simply isn't quite as responsive on Windows 8.1.
For example, under Windows 7 I could open Windows Explorer, navigate to the root folder of C:, select all the files and folders, then choose
Properties.  The system would count up all the files in all the folders at a rate of about
30,000 files per second
the first time, then about 50,000 files per second the next time, when all the file system data was already cached in RAM.
Windows 8.1 will enumerate roughly
10,000 files per second the first time, and around
18,000 files per second the second time -
a roughly 1 to 3 slowdown.  The reduced speed once the data is cached in RAM implies that something in the operating system is the bottleneck.
Not every operation is slower.  I've benchmarked raw disk I/O, and Windows 8.1 can sustain almost the same data rate, though the top speed is a little lower.  For example, Windows 7 vs. 8 comparisons using the ATTO speed benchmark:
Windows 7:
Windows 8:
-Noel
Detailed how-to in my eBooks:  
Configure The Windows 7 "To Work" Options
Configure The Windows 8 "To Work" Options

Answer 1

No worries, and thanks for your response.
The problem can be characterized most quickly by the slowdown in enumerating files in folders.  Unfortunately, besides some benchmarks that show only an incremental degradation in file read/write performance, I don't have any good before/after
measurements of other actual file operations.
Since posting the above I have verified:
My system has 8dot3 support disbled (same as my Windows 7 setup did).
Core Parking is disabled; CPU benchmarks are roughly equivalent to what they were.
File system caching is configured the same.
CHKDSK reports no problems
C:\TEMP>fsutil fsinfo ntfsInfo C:
NTFS Volume Serial Number :       0xdc00eddf00edc11e
NTFS Version   :                  3.1
LFS Version    :                  2.0
Number Sectors :                  0x00000000df846fff
Total Clusters :                  0x000000001bf08dff
Free Clusters  :                  0x000000000c9c57c5
Total Reserved :                  0x0000000000001020
Bytes Per Sector  :               512
Bytes Per Physical Sector :       512
Bytes Per Cluster :               4096
Bytes Per FileRecord Segment    : 1024
Clusters Per FileRecord Segment : 0
Mft Valid Data Length :           0x0000000053f00000
Mft Start Lcn  :                  0x00000000000c0000
Mft2 Start Lcn :                  0x0000000000000002
Mft Zone Start :                  0x0000000008ad8180
Mft Zone End   :                  0x0000000008ade6a0
Resource Manager Identifier :     2AFD1794-8CEE-11E1-90F4-005056C00008
C:\TEMP>fsutil fsinfo volumeinfo c:
Volume Name : C - NoelC4 SSD
Volume Serial Number : 0xedc11e
Max Component Length : 255
File System Name : NTFS
Is ReadWrite
Supports Case-sensitive filenames
Preserves Case of filenames
Supports Unicode in filenames
Preserves & Enforces ACL's
Supports file-based Compression
Supports Disk Quotas
Supports Sparse files
Supports Reparse Points
Supports Object Identifiers
Supports Encrypted File System
Supports Named Streams
Supports Transactions
Supports Hard Links
Supports Extended Attributes
Supports Open By FileID
Supports USN Journal
I am continuing to investigate:
Whether file system fragmentation could be an issue.  I think not, since I measured the slowdown immediately after installing Windows 8.1.
All of the settings in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem
Thank you in advance for any and all suggestions.
-Noel
Detailed how-to in my eBooks:  
Configure The Windows 7 "To Work" Options
Configure The Windows 8 "To Work" Options