There is a big difference between v3 and v4 with this - for v3 the script is running in a separate process (moi_commandprocessor.exe) and there is interprocess communication overhead with every object access. However, this loose coupling allows for interrupting the script at any time.

It's different in MoI v4, in v4 the script is executed within the same main MoI.exe process and so there is a lot less overhead.

So if you were using v3 the first thing to try is to test it with v4.

- Michael