I don’t know about other but i am facing very lag in Block area.
I have 3 screen in my application the lag is on the 2nd screen where i have almost 2500-3000 blocks. The lag is so much that i can’t even move upward and downward in the block area.
Yes even i think it too but my application is big and all that block is important i cant reduce it. I have trying clearing Browser cache but the problem is still there.
try Opera or Firefox, and i am using 8 gb ram on core i7 gen7 cpu, and i have similar blocks like you in my different apps, and when ever i face lagging problem i just close my browser or clear cache and that fixes lag problem for me