In each place, I added *one* arc manually, but at some later point (now), I look, and there are 25-50 arc objects instead of one in each place. In my case, the lag was due to tens of duplicate, overlapping arc objects in signal layers. I filed a bug report to Altium, I assume I’m not the first to do so.

Examining the outline closely, showed that while most of it was made out of the usual lines and curves, some areas consisted of a very large number of small overlapping segments:įast forward to two and a half years later… and fast forward Altium version to a whopping 17… and… your valiant and patient debugging effort is still helping poor souls hit by this nasty lag that comes suddenly. Those areas also happen to be somewhat (3-5mm) near the curves on the board outlines, not even in the immediate vicinity mind you. Restoring the shape and trying various areas of the board narrowed the search to several corners where my cursor would freeze as soon as I drag a trace there. OK, I suppose I could just respect board outline manually until routing is done and then re-enable it for for final checks? It’s not ideal but better than nothing. Aha, something to do with the board shape! I removed board shape, drew a basic rectangle instead and suddenly everything is back to normal. Removed components they seemed to be causing troubles, then re-added backĪt that last step I noticed that the same parts were behaving just fine and not slowing things down if I left them outside board outline and tried running traces there.Switching to a faster PC with more memory.Tried AD14 instead of AD13 I normally run.Many things were tried to see what’s causing this, all in vain: Not good when you have many nets to touch!

In some cases I had to stop Altium process and reopen it again. You’d touch a net to start routing a trace from it and cursor changes into a spinning “wait” circle and sits there for 30 seconds or more. And then halfway through routing I started getting some very annoying slowdowns. I went through the standard steps of importing a dxf outline, creating board shape and placing parts. Nothing that unusual or complicated, so I didn’t expect any troubles. Recently,I’ve been working on a design in Altium.

Hide nets diptrace pcb