Highlight for this build is the Enable VSync toggle that can be set from the Preferences->Graphics->Hardware tab.
Turning on VSync (default) will limit frame rate to the frequency your monitor updates. For the majority of monitors that is 60 Hz. The feature is from the upcoming SecondLife Viewer performance update.
Otherwise there are additional optimizations and some functionality tweaks.
The build is provided as is.
SHA checksum for this download is: 0c3fc73c058abcb227f12c28e416baf563f2ce05