[project @ 2003-03-27 13:54:31 by simonmar]

[project @ 2003-03-27 13:54:31 by simonmar]
Two performance tweaks:

  - Use specialised indirections, which perform the right kind of
    return without needing to enter the object they point to.  This
    saves a small percentages of memory reads.

  - Tweak the update code to generate better code with gcc.  This
    saves a few instructions per update.