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DP QC UNLIMITEDTEMPSTRINGS

From Quake Wiki

This extension alters Quake behavior such that instead of reusing a single tempstring (or multiple) there are an unlimited number of tempstrings, which are removed only when a QC function invoked by the engine returns, eliminating almost all imaginable concerns with string handling in QuakeC.

In short:

You can now use and abuse tempstrings as much as you like, you still have to use strzone (FRIK_FILE) for permanent storage however.

Implementation notes for other engine coders: These tempstrings are expected to be stored in a contiguous buffer in memory which may be fixed size or controlled by a cvar, or automatically grown on demand (in the case of DarkPlaces).

This concept is similar to quake's Zone system, however these are all freed when the QC interpreter returns.

This is basically a poor man's garbage collection system for strings.