Dov Grobgeld <dov.grobgeld@gmail.com> writes:

> Here are the tests when using the the latest cvs gdb that yields a gdb
> output file of about 800k.
>
> Without gdb-get-source-file-list override: ~139s
> With gdb-get-source-file-list override: ~125s
>
> Thus it is clear that most of the time is taken just reading the
> string into emacs. But doing find-file on the same file is almost
> instantaneous.

Here's another little experiment.  Could you apply the two attached
patches, individually, and see what difference each patch makes?
(Again, with gdb-create-source-file-list at its default of t, and
without any other patches to gdb-mi.el.)