From: Dmitry Ivankov <divanorama@gmail.com>
To: git@vger.kernel.org
Cc: Jonathan Nieder <jrnieder@gmail.com>,
"Shawn O. Pearce" <spearce@spearce.org>,
David Barr <davidbarr@google.com>,
Dmitry Ivankov <divanorama@gmail.com>
Subject: [PATCH 0/2] fast-import: improve deltas for blobs
Date: Sun, 21 Aug 2011 01:04:10 +0600 [thread overview]
Message-ID: <1313867052-11993-1-git-send-email-divanorama@gmail.com> (raw)
Currently delta base for blob objects is just a previous blob object
written. This way we just keep the last one in memory and it's cheap
(not too smart though and gains no pack size reduction most of the time).
If we also keep as last blob a response to cat-blob (whose main purpose
is to provide delta bases for a importer), svn-fe imports become faster
and packs produced become smaller.
1/2 adds a diff_delta attemps count as a related and interesting number
2/2 gives a nice performance improvement for svn-fe produced imports
Dmitry Ivankov (2):
fast-import: count and report # of calls to diff_delta in stats
fast-import: treat cat-blob as a delta base hint for next blob
fast-import.c | 17 ++++++++++++-----
1 files changed, 12 insertions(+), 5 deletions(-)
--
1.7.3.4
next reply other threads:[~2011-08-20 19:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-20 19:04 Dmitry Ivankov [this message]
2011-08-20 19:04 ` [PATCH 1/2] fast-import: count and report # of calls to diff_delta in stats Dmitry Ivankov
2011-08-20 19:04 ` [PATCH 2/2] fast-import: treat cat-blob as a delta base hint for next blob Dmitry Ivankov
2011-08-20 19:17 ` Jonathan Nieder
2011-08-21 11:01 ` David Michael Barr
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