Type checking gets stuck and fails on large scripts

The call to the 'codeinsight/check' endpoint can get stuck for long scripts, causing CPU usage to ramp up, out of memory errors, and sometimes the instance to freeze or crash.

Steps to Reproduce:

1. Put a long script such as this one in your script root: longscript.groovy
2. Select as a script file for a listener, post-function, validator, etc.

The call to the endpoint should be pending for a few minutes and cause the instance to freeze or crash.

This has been reproduced on Jira and Confluence.