Rounding the corners off

As a general rule on a largish (10 to 15,000 lines of code, I am shore this is not really large at all) gcode files, is it necessary to save 1 or 2 parts of the complete file until you have all the cutter path files necessary to cut the part saved, ready to use linuxcnc to cut the part? The reason for the question is the v 29 bobcad will follow the geometry if the file is of just a few operations, but if you have the whole file saved in gcode, the corners will get rounded off. I don't know what to expect from the software.

many thanks!

File size should have absolutely no effect on the path following.

Many thanks, andypugh! I have struggled to find a work around and the only thing that I have changed (to cut the best part so far) is breaking the large file in to 3 smaller ones. This helped in several of the areas, but in bobcad when using "profile" (used just to cut around a shape, no pocket removal) you must have studied the geometry to know with complete and total confidence the tool diameter plus the "finish cut allowance" will fit or the tool will cut adjacent material, referred to as "part avoidance", who would of knew. Having not to known what to expect from bobcad, I was at a disadvantage, they are not to forth coming about the shortcomings. While in bobcad there is a way to save 1 or a few operations, at a time, as a separate file, to memory stick to linuxcnc machine, so it is possible, but think about managing the tweaks. When you have a "pocket to cut" there seems to be a lot of time when the tool cuts air (I am aware there is a way to edit the gcode file) goes over an area already cut or long rapid travel, not as efficient as I would of thought, in addition, the cutter overlap is recommended "max" 50%. I welcome your thoughts. I have thought how I would approach a project like this in the future.
many thanks

Have you tried Fusion360? Free for hobby use, and has very good CAM.

andypugh, many thanks!! Fusion required internet at the machine, I believe, that was the show stopper. I will make this work, it just has some things that require work arounds. The issue about the length of file is unfortunate. If I find new information I will comment about it.

many thanks for all your help!!!

I still don't think that the actual length of the file has anything to do with the path following. It has to be something inside the files.