pp-max-width has been introduced in Emacs 29. The fact that pp becomes too slow is likely something to be fixed before the next Emacs release.
Good catch and I agree. I compile emacs from the master branch and probably discovered in the emacs-news which I check between upgrades and I probably customized it subsequently, even though I forgot about the customization later.
While we can work around this issue on Org side, I'd prefer to ask Emacs developers first and see if they can come up with a fix. I suggest you to file a bug report to Emacs. You may provide the contents of your org-persist-index-file inside org-persist-directory. AFAIU, it is what is taking a lot of time to print.
I submitted a bug report where I attached the index file and a minimal example file which benchmarks running pp on it, with which I could reproduce my issue from emacs -Q: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=58687 Let's see what the emacs devs have to say about it. -- Michael Eliachevitch Public PGP Key: https://keyoxide.org/hkp/546908c782383ad0e7d894ec1b8f95c8125dce31
