Speedup idea for troff/nroff

[Doug Gwyn]

In article <387 at ivax.doc.ic.ac.uk> lmjm at doc.ic.ac.uk (Lee McLoughlin) writes:
>...  Would it be possible to use the unexec routine to create a
>preloaded version by running troff to read in the macro package
>then unexecing itself out?  ...

This is essentially the approach used by "old troff" in AT&T
releases, under the name "compacted macros" (just the pre-compiled
macro data is saved, not the whole process).  New troff dropped
this (probably because BWK never had it in his version).