Follow-up Comment #10, bug #67509 (group groff): At 2025-09-18T21:27:40-0400, G. Branden Robinson wrote: > So, let's do the time warp (again?). > > $ git checkout 7705cbd5f8fb4b666954edcbbc810feff8020cbc > $ git show | head -n 5 > commit 7705cbd5f8fb4b666954edcbbc810feff8020cbc > Author: G. Branden Robinson <g.branden.robin...@gmail.com> > Date: Mon Mar 4 04:24:34 2024 -0600 > > doc/GMPfront.t.in: Resync with an.tmac's `MR`. > $ noisily env CORES=10 make-groff-fast > $ make -C build install > $ time (pdfmom --roff -Tpdf -man -petk LMB.prep > dj-faster.pdf ) > [warnings snipped] > real 0m36.087s > user 0m45.960s > sys 0m0.717s > > > Oy, vey. Yes, that's way, way better. > > ...but wait. This is odd. > > $ git checkout cd9fde325fd889f673f9603b43e1204b1fde42fc > $ git show | head -n 5 > commit cd9fde325fd889f673f9603b43e1204b1fde42fc > Author: G. Branden Robinson <g.branden.robin...@gmail.com> > Date: Mon Mar 4 05:24:40 2024 -0600 > > [pdf]: Implement linear bookmark tag search. > $ noisily env CORES=10 make-groff-fast > $ make -C build install > $ time (pdfmom --roff -Tpdf -man -petk LMB.prep > dj-faster.pdf ) > [warnings snipped] > real 0m36.947s > user 0m47.109s > sys 0m0.920s > -verbatim- > > Something fishy is going on here. I can replicate HEAD's miserable > performance, but my performance-trashing linear search > implementation...didn't trash performance?! > > Huh. I vaguely remember you undid my linear search, then put it back, > or something like that. Maybe something got damaged in the process. > > Looks like I have a bisection in my future with potential 6+-minute > waits between stages. Fun! :-|
Well...
$ git checkout git co cd9fde325fd889f673f9603b43e1204b1fde42fc
$ git show | head -n 5
commit 2387949ffc11b753dd91480dcb85be6c22819790
Author: Deri James <d...@chuzzlewit.myzen.co.uk>
Date: Fri Apr 12 17:10:49 2024 +0100
Correct linear search introduced in commit cd9fde325f
$ noisily env CORES=10 make-groff-fast
$ make -C build install
$ time (pdfmom --roff -Tpdf -man -petk LMB.prep > dj-faster.pdf )
[warnings snipped]
real 6m20.940s
user 6m55.421s
sys 0m0.876s
Huh.
Guess I'll bisect more later, now with a much-reduced commit range.
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