Why is git-clone --reference so slow?
From: David Woodhouse <dwmw2@infradead.org>
Date: 2016-06-15 22:42:52
My DSL line sucks; I know this. But why is git-clone so bad at using it? This is slow and seems to be downloading a lot of stuff it doesn't need... pmac /pmac/git $ git-clone --reference /pmac/git/linux-2.6 git://git.kernel.org/pub/scm/linux/kernel/git/geoff/ps3-linux.git remote: Generating pack... remote: Done counting 14428 objects. remote: Deltifying 14428 objects. remote: 100% (14428/14428) done Indexing 14428 objects. 25% (3662/14428) done At this point I got bored and hit ^C, then logged in to hera and did it there, then rsync'd the result... hera /home/dwmw2/x $ git-clone -n --bare --reference /pub/scm/linux/kernel/git/torvalds/linux-2.6.git /pub/scm/linux/kernel/git/geoff/ps3-linux.git remote: Generating pack... remote: Done counting 14490 objects. remote: Deltifying 14490 objects. remote: 100% (14490/14490) done Indexing 14490 objects. remote: Total 14490, written 14490 (delta 579), reused 5598 (delta 367) 100% (14490/14490) done Resolving 579 deltas. 100% (579/579) done pmac /pmac/git/ps3-linux $ rsync -avz master.kernel.org:/home/dwmw2/x/ps3-linux/ .git pmac /pmac/git/ps3-linux $ echo /pmac/git/linux-2.6/.git/objects > .git/objects/info/alternates That was a _lot_ faster, and abused my poor DSL line a lot less. Why's git so bad at it? -- dwmw2