Try my example. cv or exact stop doesn't matter. Maybe it will be different on yours, but I've tried 2 PCs here, both about 1.7Ghz. This example is all the same axis so that the delay is more noticeable.
F100
(accel decelled moves:)
g0 x1
x2
x3
x4
x5
(one fluid movement:)
g1 x4
x3
x2
x1
x0
(now with pauses:)
g0 x1
g1 x2
g0 x3
g1 x4
g0 x5
When I use the term safe z, I may be using it in an inappropriate way. To be honest, I haven't looked into the safez options in mach3... I am using it to mean any movements on my mill that are made at a high level to clear the work area Here's an example to explain what I mean (typed in off the top of my head so I hope I get it right heh heh):
(engrave a square on lamacoid.)
f100
g0x0y0z0 ;initialize to known state
x1y1 ; go to first corner at rapid, 'safe z height'
z-1 ; drop engraving bit
g01 x2 ; draw bottom of square. There was a delay before this command.
g00 z0 ; this is the 'safe z' command that the cam program puts in. There was a slight delay before this command.
g00 z-1 ; it would take me a long time to remove these, plus sometimes they're needed, sometimes they're not. Mach should process these without delay anyway.
g01 y2 ; draw right side of square. There was a slight delay before this command.
g00 z0 ; go to safe z to move to beginning of next line. There was a slight delay before this command.
g00 z-1; (coincidentally, we are already here - no 'safe z' xy moves needed at this time)
g01 x1 ; draw top of square. There was a slight delay before this command.
g00 z0 ; go to safe z before moving to beginning of next line. There was a slight delay before this command.
g00 z-1
g01 y1 ; left side of square. There was a slight delay before this command.
g00 z0 ; There was a slight delay before this command.
x0y0 ; back home for something to do.
I suppose I should be clear about this too... I'll mention again I am talking about around 1/4 to 1/2 of a second of delay (haven't measured it). Doesn't sound like much, but in a gcode program with thousands of little segments, this can add up to a lot of extra time. Imagine a cnc machine emulating an artist with a sketch pencil & you'll get the idea.
*sigh* I was really hoping this would be a small, easy deal.