wide set progress

[Gaius Mulley]

Hello,

I thought I'd post an update regarding the re-implementation of wide sets.
The re-implementation has not yet been git pushed - as there are three
known bugs (in shift, rotate and record constructors).  But it
bootstraps.  The new wide set implementation follows the M2R10 approach
of using a library module to contain the SET operators (AND, OR, NOT,
etc).  A wide set is implemented as an ARRAY [0..n] OF BYTE.

More details and performance results can be found here (a work in progress):

   https://splendidisolation.ddns.net/Southwales/gaius/web/m2-wideset.html

In summary the operators NOT, AND, OR are faster in the
re-implementation.  Currently INCL/EXCL are slightly slower - I expect
this to change as there is no logical difference between the old/new
versions for these operations.  I'd also imagine that NOT, AND, OR will
further improve performance when they are altered to work on word units
(rather than byte),

regards,
Gaius