Mike,
Looks like you're right about VC12 being a bit faster than MinGW64, Here is the Mandelbrot example we used before. I also attached the Linux Script BASIC version. (64 bit this time)
' ScriptBasic GFX - Mandelbrot
IMPORT gfx.inc
s = gfx::Window(640,480,"ScriptBasic GFX Mandelbrot")
ts = gfx::Time()
FOR y = 0 TO 479
FOR x = 0 TO 639
cx = (x - 320) / 120
cy = (y - 240) / 120
rit = gfx::Mandelbrot(cx, cy, 510)
gfx::PixelRGBA s, x, y, rit * 32, rit * 16, rit * 8, 255
NEXT
NEXT
te = gfx::Time()
gfx::stringColor s, 20, 15, "Time: " & FORMAT("%.4f",(te-ts)/1000) & " Seconds." & CHR(0), 0x000000ff
gfx::Update
WHILE gfx::KeyName(1) <> "+escape"
WEND
gfx::Close