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authorJunio C Hamano <>2006-04-27 07:13:34 (GMT)
committerJunio C Hamano <>2006-04-27 07:34:12 (GMT)
commitb34c39cf31e370dad3bcfba29ee8cd023c40fd6b (patch)
treefc87c8293aefebb4a7a4da0733cffdb36768ffa9 /
parent497c32136f80aca5f724bf70c2a0f44b63cb79f1 (diff)
read-tree: teach 1 and 2 way merges about cache-tree.
This teaches one-way and two-way "read-tree -m" (and its special form, "read-tree --reset" as well) not to discard cache-tree but invalidate only the changed parts of the tree. When switching between related branches, this helps the eventual commit (i.e. write-tree) by keeping cache-tree valid as much as possible. This does not prime cache-tree yet, but we ought to be able to do that for no-merge (i.e. reading from a tree object) case and, and also perhaps 1 way merge case. With this patch applied, switching between the tip of Linux 2.6 kernel tree and a branch that touches one path (fs/ext3/Makefile) from it invalidates only 3 paths out of 1201 cache-tree entries in the index, and subsequent write-tree takes about a half as much time as before. Signed-off-by: Junio C Hamano <>
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