Hi Peff, On Thu, 28 Sep 2017, Jeff King wrote: > If you're planning on using an oidset to mark every object in a > 100-million-object monorepo, we'd probably care more. But I'd venture to > say that any scheme which involves generating that hash table on the fly > is doing it wrong. At at that scale we'd want to look at compact > mmap-able on-disk representations. Or maybe you would look at a *not-so-compact* mmap()able on-disk representation, to allow for painless updates. You really will want to avoid having to write out large files just because a small part of them changed. We learn that lesson the hard way, from having to write 350MB worth of .git/index for every single, painful `git add` operation. Ciao, Dscho
