Re: MPS: weak hash tables

[Pip Cet <pipcet@protonmail.com>]

On Sunday, July 7th, 2024 at 15:52, Helmut Eller <eller.helmut@gmail.com> wrote:
> On Sun, Jul 07 2024, Gerd Möllmann wrote:
> 
> > > > Oh, I think I found something! "messages" is a let-bound variable
> > > > containing all messages. The backtrace goes there. But the backtrace
> > > > also prints the values of let-bound variables in closures, so it'll
> > > > print all messages recursively, giving us O(N^2) behavior at least...
> > > 
> > > Hm, messages is let-bound in ert-test-run-tests-batch-expensive. How
> > > can it have any effect or be effected by other tests?
> > 
> > I thought it maybe comes from here
> > 
> > (defun ert-run-tests (selector listener &optional interactively)
> > "Run the tests specified by SELECTOR, sending progress updates to LISTENER."
> > (let* ((tests (ert-select-tests selector t))
> > (stats (ert--make-stats tests selector)))
> > 
> > Haven't checked that though, the lines were too long for me.
> 
> 
> You mean "stats", which includes results and possibly big objects of the
> previous tests, is included in the backtrace. And
> ert-test-run-tests-batch-expensive prints it with altered printer
> settings. Could be.

So

(cl-defmethod cl-print-object ((object ert--stats) stream))

should help? It appears to...