Description
The problem, and a suggested fix, are described in this forum post: https://forum.fritzing.org/t/adafruit-permaproto-causes-lag/5994/8. I can confirm that the files attached in that post fix the lag for me.
A user named smithyinc posted:
[...] I figured out that the cause of the lag on my MacOS machine was a super complicated background layer in the Icon and Breadboard SVGs. I have removed the overly complicated layer with a simplified one and “generic-ized” some of the common Adafruit Perma Proto boards.