UnitAddAbility() lag

Everytime I add an ability to a unit the game slightly lags. Exactly: I'm adding a spellbook dummy ability with a real ability inside. Do you know a way how to prevent the game from lagging in this case? I need to add and remove abils pretty often, so this lag is very irritating.

I understand a lag when the game has to load some new models or whatever, but in this case the game should not load anything.

How often do you add abilities? However, it should not lag unless you add a few hundred abilities in a second... It depends on your computer. EDIT: Its different if they get cast or something, though...

I'm not adding hundreds of abilies, just when a hero picks up an item it adds a ability to him. I have AMD AXP 2500+ 512RAM, so the computer is for W3 powerful enough.

You can prevent the learn lagg with preplacing a unit with the needed abilities and removing it during init or whatever you want to do.
I also make this for my maps and it works nice.

If it's the first time you add that ability, it is normal.

Yes, Fireeye is right, you need to preload the abilities or you will get "first time lag" when you add the ability. So if you make a unit in the corner of your map where nobody is going to see it, add all your abilities, you will get like a 0.5 sec lag spike (depending on how many there is), then remove it about 5 seconds later, then you wont get this small lag when you add the ability.

Yes, thank you all, I've done so and it is now OK