c# - Auto Completion with LDAP data is slow

Question

I am using an auto completion property with a text box in C#. The values to be displayed for the suggestions are retrieved from the LDAP directory.

I am using the FindAll method to retrieve the data from LDAP.

After I got the SearchResultCollection from FindAll, I am using it for the first time, I am experiencing a small delay.

This make my suggestion in the autocomplete slow. The SearchResultCollection I am getting has a count of 44.

What might be the possible reasons for this delay and how can I overcome that?

Thanks in advance.