bug#20887: 'make bootstrap' now verrrry slow due to recent isearch changes

[Artur Malabarba]

Yes, I see why that would cause a problem.
Does anyone have any idea how we could approach this, then?

That slow piece code has no need to be compiled so early, but I don't
know how to avoid that. I can move it to another file, but then
isearch will need to require that file anyway so the delay will still
be there.

Options I see
1. I could move the code to a separate file, and then only require
that file as part of the isearch command, so it wouldn't be loaded at
compile time.
2. I could just save that char-table directly in the file. It would be
large, but it should speed up the loading by a lot.