According to information I have picked up somewhere (but can't properly confirm via web searches ATM) there was a compiler in the 90s (the IBM VisualAge compiler maybe?) which had a special caching daemon mode. The basic idea was that you would send your code to that process and then it could return cached compile results without needing to reparse and reprocess same bits of code over and over. A sort of an in-compiler CCache, if you will. These compilers no longer seem to exist, probably b...