UF 9.7.04 ProcEditor is very slow

Hi Freaks

For a long time, the proc editor in UF 9.7.4 works well.
But since a few weeks it going slower and slower.
First I thought it is the internet, but this happens at every connection to the internet
Then I did a look into the INI:  maxtags is 20 and even if I set it to 0 ... 
It looks like ot depends of the size of the proccode
Small trigger or at the beginning of a large trigger: The editor responds immediately to input.
Large triggers at the end of the code. You can wait a second for every character ...

Any idea?

Ingo