If UI is chugging for on the order of seconds for seemingly trivial operations, I think just saying it's "badly optimized" is like saying that it's a bit of a w

If UI is chugging for on the order of seconds for seemingly trivial operations, I think just saying it's "badly optimized" is like saying that it's a bit of a walk from my place to Costa Rica. It could be ordered of magnitude faster and still true.