Delphi: How to diagnose sluggish UI?
- by Ian Boyd
i have a form, which you can pretend is laid out like Windows Explorer:
panel on the left
splitter
client panel
+------------+#+-----------------------+
| |#| |
| |#| |
| |#| |
| |#| |
| Left |#| Client |
| |#| |
| |#| |
| |#| |
| |#| |
| |#| |
+------------+#+-----------------------+
^
|
+----splitter
The the left and client area panels are each rich with controls.
The problem is that using the splitter is very sluggish. i would expect that a modern 2 GHz computer can re-display the form as fast as a human can push the mouse around. But that's definitely not the case, and it takes about 200-300 ms before the form is fully re-adjusted.
The form has about 100 visual controls on it, no code, or custom controls.
How do i go about tracing who's the cause of the sluggishness?
