[Xcb] Basic test of Qt5 toolkit performance, XCB versus native, XLIB (XCB wins)

[Rick Stockton]

Samuel,

My test program was the "moveblocks" Example (widget-based). I simply
increased the size of the Window, the size of the Blocks, and the moving
speed, and I sent some QDebug 'total moves done' and 'elapsed time'
statistics to the console, while watching "top". Do you want to use this
simplistic test, even though YOU can probably come up with something
MUCH BETTER in about 5 minutes of time?