Why is my debugger so slow?

debugging, delphi

Solution

After weeks of searching for an answer, I found this Microsoft knowledge base article fixes my problem : http://support.microsoft.com/kb/321410/nl

The point is, I installed Microsoft Script Editor a while back to do some server-side javascript debugging. This also installs a service called "Machine Debug Manager" (Mdm.exe), which is the cause for the slowdown. After disabling this service, debugger speed returned to normal!

Problem

Since some time, my Delphi debugger became much slower than I was used to before. I noticed this in both Delphi 2007 and 2009, so it seems it's something outside of Delphi itself... What causes this behaviour, and how can I prevent this?

Original source