On Mon, Jan 08 2018, Derrick Stolee jotted: > On 1/7/2018 5:42 PM, Ævar Arnfjörð Bjarmason wrote: >> If something cares about both throughput and e.g. is saving the >> abbreviated SHA-1s isn't it better off picking some arbitrary size >> (e.g. --abbrev=20), after all the default abbreviation is going to show >> something as small as possible, which may soon become ambigous after the >> next commit. > > Unfortunately, with the way the abbreviation algorithms work, using > --abbrev=20 will have similar performance problems because you still > need to inspect all packfiles to ensure there isn't a collision in the > first 20 hex characters.
I meant (but forgot to write) that this would be some new mode, e.g. --abbrev=20 --no-abbrev-check which would just perform a substr() of the 40 character SHA-1. It might be interesting to add that for reasons completely unrelated to your series. Thanks for answering the rest.
