When there are many controls in the interface, the entire program display will appear delay.
My computer configuration is Pentium G645, memory capacity 6GB, WIN10 the operating system, in the example "example_03_layout_container.nim", I compiled and executed it, found that the startup time is more than 2 seconds, has turned off the antivirus software, to ensure that it is not affected, but the speed is still relatively slow. Is there a lot of controls in the example that show slowly? I tried "libui" again. The program compiled through it will be displayed immediately without delay.

From this point of view, we should have a lot of room for optimization.