On Sun, Nov 10, 2019 at 11:21:49PM -0500, Jeff King wrote: > On Sat, Nov 09, 2019 at 12:31:31PM +0100, Sebastiaan Dammann wrote: > All of that's obviously a workaround, though. The real issue is the > stack exhaustion. > > > I hope to hear your view on this. Is this an (confirmed) issue with > > git? Are there beside the workaround I mentioned, any other > > workarounds? > > Yes, this is well known. It's covered in the test suite (unfortunately > still failing, of course) since 31625b34c0 (t6120: test describe and > name-rev with deep repos, 2017-09-07). > > There was a proposed fix recently in: > > https://public-inbox.org/git/20190919214712.7348-1-szeder.dev@xxxxxxxxx/ > > but it doesn't seem to have been picked up. I'm not sure what the > current status is. It's getting along, being polished, clarified and fine-tuned ever so slowly. E.g. it turned out that the performance penalty from eliminating the recursion is basically entirely caused by using a 'commit-list' to store interesting parents (the overhead of a malloc() on each insert and a free() on each pop). Switching to a LIFO 'prio-queue' doesn't cause any measurable slowdown.
