I have a main.for and a modules.for (I can't share either of them).
Main.for contains 500+ lines of code and modules.for contains 13000+ lines of code. When I edit main.for, Community studio runs just fine but when I edit modules.for I have about 2 seconds to type anything before Community studio "freezes." The reason I put "freeze" in quotations is that it is not unresponsive as in I can still type and when Community studio recovers the typed letters during "freezing" would appear, and then Community studio enters another round of freezing because I typed something new.
I received the codes from my colleagues and they said they do not experience the same problem. However, they are using Community Studio 2015, 2013, or even earlier versions. My computer shouldn't be the problem either as I have 32 GB memory, Radeon R7 M465X, and usual setups in a new Optiplex 7450 AIO computer.
So I think it maybe related to the 2017 version of Community Studio, does anyone have an insight on this problem?
Apparently, sometimes graphics acceleration can cause problems like this. I turned off the option in Tools -> Options -> General -> Uncheck "Automatically adjust visual experience..." -> Uncheck "Use hardware graphics acceleration if available"