Replace function handles with function names in cellfun calls for 15% speedup. * accumarray.m arrayfun.m, blkdiag.m, cell2mat.m, common_size.m, interp3.m, interpn.m, __isequal__.m, structfun.m, voronoi.m, strread.m, fullfile.m, getfield.m, __xzip__.m, setfield.m, what.m, pkg.m, axis.m, pareto.m, __ghostscript__.m, __go_draw_axes__.m, __patch__.m, refreshdata.m, whitebg.m, lcm.m, index.m, strcat.m, strmatch.m, validatestring.m: Replace function handles in calls to cellfun with double quoted function names.

--- a/scripts/miscellaneous/setfield.m
+++ b/scripts/miscellaneous/setfield.m
@@ -50,8 +50,8 @@
   endif
   subs = varargin(1:end-1);
   rhs = varargin{end};
-  flds = cellfun (@ischar, subs);
-  idxs = cellfun (@iscell, subs);
+  flds = cellfun ("isclass", subs, "char");
+  idxs = cellfun ("isclass", subs, "cell");
   if (all (flds | idxs))
     typs = merge (flds, {"."}, {"()"});
     obj = subsasgn (obj, struct ("type", typs, "subs", subs), rhs);