Hi,
File loading on a Fast PC even as big as 100MB is instant, and very quick even on low spec PC's/NB's I tested.
Generating the Toolpath is very slow (3.5+ times slower than Mach3), but does not have much GPU usage if any, until it has completed, then depending on the G-Code size 3 or 4 axis simultaneous or not, it will have high GPU usage up to 100%.
I have tried many G-Code files from large to small on this fast PC and depending on the files size it will reach 100% GPU usage.
On PC's without a video card is has less of an effect.
On running small jobs on mills and router tables, this mach4 version is not an issue and would not be seen.
Users performing large fine 3D engravings this is a major problem.
Mach3 with large 3D engraving files 3/4 axis even simultaneous on low spec machines is not an issue (3Ghz with 1 or 2 GB RAM and no video card). Even full display of the toolpath actually turning (4 axis) while cutting is not an issue.
The Mach4 program has some sort of continuous loop with the Toolpath generation once it has completed its install cycle.
Regards,
Mauri.