GnuCash 2.6.3 (portable) for Windows taking a LONG time to read/save file

[Lance Alligood]

Hello. I've already sought help with the portable Windows version of
GnuCash over at portable apps.com. (Feel free to look at the discussion
thread here: http://portableapps.com/node/41588.) However, the problem is
that I am still experiencing long times (2+ minutes) in reading in and
saving my GnuCash data file. While I do not recall the precise date or
version that this problem started, but I am pretty sure it started
somewhere between v2.4.5 and v2.6.1. It has persisted continually since
then.

Here is my setup:
* I am currently running GnuCash v2.6.3 for Windows portable. There are a
few different Windows PCs that I use. They are mostly Windows 7 64-bit but
there's the occasional Windows XP SP3 I use.
* I also run on my laptop GnuCash v2.6.1 for Ubuntu Linux, which is the
current release in the Ubuntu 14.04 standard apt repository.
* The flash drive where I store my data file--& normally run the GnuCash
for Windows portable executable--is a Transcend 64GB USB 3.0 drive. For
every other use, application, and/or operating system that I use this drive
with, (aside from GnuCash for Windows) it reads & writes with exceptional
speed.
* My GnuCash data file is XML-based, ~600KB when compression is enabled or
~8.0MB when saved without compression. I use GnuCash purely for balancing a
checking account & savings account. No online activity, no stocks, no
reports, etc.

When using GnuCash for Ubuntu, my data file consistently loads and saves in
well under 3 seconds, whether GnuCash is compressing the file or not. The
laptop has USB 3.0 ports.

When using GnuCash for Windows portable, my same data file loads and saves
in well OVER 2 MINUTES. Although my data file resides on the flash drive
described above, I have taken great length to rule out the drive, the PC
hardware, and even the operating system itself!
* If I copy the datafile to the PC hard drive, it still takes 2+ minutes to
load/save. (Probably can't be the flash drive.)
* If I install & run GnuCash executable from the hard drive, it still takes
2+ minutes to load/save my data file. (Can't be an issue with the USB port.)
* If I run a Crunchbang Linux virtual machine (using Virtualbox) on the
same Windows PC & run GnuCash v2.4.5--that's the current release in
Debian/Crunchbang repository--AND mount my flash drive in the VM, the
read/write time of my data file drops back to the expected less than 5
seconds! The Windows PC where I ran the VM only has USB 2.0 ports, so I
expected it to be slightly slower than my Ubuntu laptop. (As the VM has to
work with host Windows OS for the VM, it probably cannot be the Windows OS!)

So that leaves me with the conclusion that there must be something with the
GnuCash Windows executable as it seems to struggle with reading in/saving
to the same data file that GnuCash for Linux can read/write to much, much
faster.

I would be willing to provide additional information, trace files, & even
an obfuscated version of my data file (although I got a "Can't call method
"getData" on an undefined value at ./gnucash-obfuscate.pl line 48." error
when I tried it earlier), if that would assist in resolving this issue.

Thank you very much for your time & assistance with this.

--Lance