Version 2.01.146823
The same seems to be the case for listboxes and treeViews. The more entries they have, the slower they becomes.
Execute the following code in Eden Editor:
```
[] spawn
{
disableSerialization;
_display = findDisplay 313 createDisplay "RscDisplayEmpty";
_edit = _display ctrlCreate ["RscEdit", 645];
_edit ctrlSetPosition [0,0,1,0.04];
_edit ctrlSetBackgroundColor [0,0,0,1];
_edit ctrlCommit 0;
_tv = _display ctrlCreate ["RscTreeSearch", -1];
_tv ctrlSetFont "EtelkaMonospacePro";
_tv ctrlSetFontHeight 0.01;
_tv ctrlSetPosition [0,0.06,1,0.94];
_tv ctrlSetBackgroundColor [0,0,0,1];
_tv ctrlCommit 0;
_classes = "true" configClasses (configFile >> "CfgVehicles");
for "_i" from 0 to 5000 do
{
_tv tvAdd [[], configName selectRandom _classes];
};
};
```