This is a macOS10.13 issue, specific for some Intel GPU cards. Apple has fixed(partially) this issue inside macOS10.13.4 released build.
Following are the workaround for resolving this issue.
1) Update your mac machine to latest macOS10.13.4. Here, Apple has fixed this issue to some extent. You will face very less number of rendering issues.
2) Disable GPU preview and set display performance as typical.
Once you have updated to macOS10.13.4 .You might still face some rendering issues. Since, Apple has not fixed this issue completely.
Please switch off GPU rendering for these cases and report a separate post for tracking.Anonymous commented
Please do something about this - it is not possible to work like this! Why dose it take so long? :( I'm earning my money with it - an I also give you money every month for using the program - can I get a discount? Because it is not really usable!?