xymatrix message). If you followed the rule of starting all
entries with a (nonexpandable) character or { then you can insert the declaration
\CompileMatrices
|
in the preamble of your document: this will create temporary
files
containing compiled versions of each
matrix that can be loaded very quickly; they are automatically
recreated when a matrix is changed.
If this causes some diagrams to not work, then such compilation can be
explicitly switched off by using \xymatrixnocompile in place of
\xymatrix. Compilation can be switched off completely with
\NoCompileMatrices (which respects TeX grouping as does
\CompileMatrices, by the way).
And if you are still not satisfied with the speed then you can add the following:
\OnlyOutlines
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which will omit all compiled pictures; the additional command
\ShowOutlines will add a dotted rectangle outlining the size of
the picture.