mirrors/git
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge branch 'ps/fetch-mirror-optim'

Browse Source 
Various optimization for "git fetch".

* ps/fetch-mirror-optim:
  refs/files-backend: optimize reading of symbolic refs
  remote: read symbolic refs via `refs_read_symbolic_ref()`
  refs: add ability for backends to special-case reading of symbolic refs
  fetch: avoid lookup of commits when not appending to FETCH_HEAD
  upload-pack: look up "want" lines via commit-graph
This commit is contained in:
Junio C Hamano
2022-03-16 17:53:07 -07:00
parent 47e0380289 0a7b38707d
commit 6969ac64bf
10 changed files with 122 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
builtin/fetch.c
View File

@ -1146,7 +1146,6 @@ static int store_updated_refs(const char *raw_url, const char *remote_name,
want_status <= FETCH_HEAD_IGNORE;
want_status++) {
for (rm = ref_map; rm; rm = rm->next) {
struct commit *commit = NULL;
struct ref *ref = NULL;
if (rm->status == REF_STATUS_REJECT_SHALLOW) {
@ -1157,21 +1156,34 @@ static int store_updated_refs(const char *raw_url, const char *remote_name,
}
/*
* References in "refs/tags/" are often going to point
* to annotated tags, which are not part of the
* commit-graph. We thus only try to look up refs in
* the graph which are not in that namespace to not
* regress performance in repositories with many
* annotated tags.
* When writing FETCH_HEAD we need to determine whether
* we already have the commit or not. If not, then the
* reference is not for merge and needs to be written
* to the reflog after other commits which we already
* have. We're not interested in this property though
* in case FETCH_HEAD is not to be updated, so we can
* skip the classification in that case.
*/
if (!starts_with(rm->name, "refs/tags/"))
commit = lookup_commit_in_graph(the_repository, &rm->old_oid);
if (!commit) {
commit = lookup_commit_reference_gently(the_repository,
&rm->old_oid,
1);
if (!commit)
rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
if (fetch_head->fp) {
struct commit *commit = NULL;
/*
* References in "refs/tags/" are often going to point
* to annotated tags, which are not part of the
* commit-graph. We thus only try to look up refs in
* the graph which are not in that namespace to not
* regress performance in repositories with many
* annotated tags.
*/
if (!starts_with(rm->name, "refs/tags/"))
commit = lookup_commit_in_graph(the_repository, &rm->old_oid);
if (!commit) {
commit = lookup_commit_reference_gently(the_repository,
&rm->old_oid,
1);
if (!commit)
rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
}
}
if (rm->fetch_head_status != want_status)