From 68067ca1efcbb0408b931e08654a5e32de975ced Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Wed, 23 Jul 2008 15:13:41 -0700 Subject: [PATCH] builtin-branch.c: optimize --merged and --no-merged "git branch --no-merged $commit" used to compute the merge base between the tip of each and every branch with the named $commit, but this was wasteful when you have many branches. Inside append_ref() we literally ran has_commit() between the tip of the branch and the merge_filter_ref. Instead, we can let the revision machinery traverse the history as if we are running: $ git rev-list --branches --not $commit by queueing the tips of branches we encounter as positive refs (this mimicks the "--branches" option in the above command line) and then appending the merge_filter_ref commit as a negative one, and finally calling prepare_revision_walk() to limit the list.. After the traversal is done, branch tips that are reachable from $commit are painted UNINTERESTING; they are already fully contained in $commit (i.e. --merged). Tips that are not painted UNINTERESTING still have commits that are not reachable from $commit, thus "--no-merged" will show them. With an artificial repository that has "master" and 1000 test-$i branches where they were created by "git branch test-$i master~$i": (with patch) $ /usr/bin/time git-branch --no-merged master >/dev/null 0.12user 0.02system 0:00.15elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+1588minor)pagefaults 0swaps $ /usr/bin/time git-branch --no-merged test-200 >/dev/null 0.15user 0.03system 0:00.18elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+1711minor)pagefaults 0swaps (without patch) $ /usr/bin/time git-branch --no-merged master >/dev/null 0.69user 0.03system 0:00.72elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+2229minor)pagefaults 0swaps $ /usr/bin/time git-branch --no-merged test-200 >/dev/null 0.58user 0.03system 0:00.61elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+2248minor)pagefaults 0swaps Signed-off-by: Junio C Hamano --- builtin-branch.c | 59 +++++++++++++++++++++++++++++++----------------- 1 file changed, 38 insertions(+), 21 deletions(-) diff --git a/builtin-branch.c b/builtin-branch.c index 3708a50eb..5db8ad836 100644 --- a/builtin-branch.c +++ b/builtin-branch.c @@ -13,6 +13,8 @@ #include "remote.h" #include "parse-options.h" #include "branch.h" +#include "diff.h" +#include "revision.h" static const char * const builtin_branch_usage[] = { "git branch [options] [-r | -a] [--merged | --no-merged]", @@ -179,25 +181,21 @@ static int delete_branches(int argc, const char **argv, int force, int kinds) struct ref_item { char *name; unsigned int kind; - unsigned char sha1[20]; + struct commit *commit; }; struct ref_list { + struct rev_info revs; int index, alloc, maxwidth; struct ref_item *list; struct commit_list *with_commit; int kinds; }; -static int has_commit(const unsigned char *sha1, struct commit_list *with_commit) +static int has_commit(struct commit *commit, struct commit_list *with_commit) { - struct commit *commit; - if (!with_commit) return 1; - commit = lookup_commit_reference_gently(sha1, 1); - if (!commit) - return 0; while (with_commit) { struct commit *other; @@ -213,6 +211,7 @@ static int append_ref(const char *refname, const unsigned char *sha1, int flags, { struct ref_list *ref_list = (struct ref_list*)(cb_data); struct ref_item *newitem; + struct commit *commit; int kind; int len; static struct commit_list branch; @@ -227,8 +226,12 @@ static int append_ref(const char *refname, const unsigned char *sha1, int flags, } else return 0; + commit = lookup_commit_reference_gently(sha1, 1); + if (!commit) + return error("branch '%s' does not point at a commit", refname); + /* Filter with with_commit if specified */ - if (!has_commit(sha1, ref_list->with_commit)) + if (!has_commit(commit, ref_list->with_commit)) return 0; /* Don't add types the caller doesn't want */ @@ -239,12 +242,8 @@ static int append_ref(const char *refname, const unsigned char *sha1, int flags, branch.item = lookup_commit_reference_gently(sha1, 1); if (!branch.item) die("Unable to lookup tip of branch %s", refname); - if (merge_filter == SHOW_NOT_MERGED && - has_commit(merge_filter_ref, &branch)) - return 0; - if (merge_filter == SHOW_MERGED && - !has_commit(merge_filter_ref, &branch)) - return 0; + add_pending_object(&ref_list->revs, + (struct object *)branch.item, refname); } /* Resize buffer */ @@ -258,7 +257,7 @@ static int append_ref(const char *refname, const unsigned char *sha1, int flags, newitem = &(ref_list->list[ref_list->index++]); newitem->name = xstrdup(refname); newitem->kind = kind; - hashcpy(newitem->sha1, sha1); + newitem->commit = commit; len = strlen(newitem->name); if (len > ref_list->maxwidth) ref_list->maxwidth = len; @@ -305,7 +304,13 @@ static void print_ref_item(struct ref_item *item, int maxwidth, int verbose, { char c; int color; - struct commit *commit; + struct commit *commit = item->commit; + + if (merge_filter != NO_FILTER) { + int is_merged = !!(item->commit->object.flags & UNINTERESTING); + if (is_merged != (merge_filter == SHOW_MERGED)) + return; + } switch (item->kind) { case REF_LOCAL_BRANCH: @@ -333,7 +338,7 @@ static void print_ref_item(struct ref_item *item, int maxwidth, int verbose, strbuf_init(&subject, 0); stat[0] = '\0'; - commit = lookup_commit(item->sha1); + commit = item->commit; if (commit && !parse_commit(commit)) { pretty_print_commit(CMIT_FMT_ONELINE, commit, &subject, 0, NULL, NULL, 0, 0); @@ -346,7 +351,7 @@ static void print_ref_item(struct ref_item *item, int maxwidth, int verbose, printf("%c %s%-*s%s %s %s%s\n", c, branch_get_color(color), maxwidth, item->name, branch_get_color(COLOR_BRANCH_RESET), - find_unique_abbrev(item->sha1, abbrev), + find_unique_abbrev(item->commit->object.sha1, abbrev), stat, sub); strbuf_release(&subject); } else { @@ -359,22 +364,34 @@ static void print_ref_list(int kinds, int detached, int verbose, int abbrev, str { int i; struct ref_list ref_list; + struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1); memset(&ref_list, 0, sizeof(ref_list)); ref_list.kinds = kinds; ref_list.with_commit = with_commit; + if (merge_filter != NO_FILTER) + init_revisions(&ref_list.revs, NULL); for_each_ref(append_ref, &ref_list); + if (merge_filter != NO_FILTER) { + struct commit *filter; + filter = lookup_commit_reference_gently(merge_filter_ref, 0); + filter->object.flags |= UNINTERESTING; + add_pending_object(&ref_list.revs, + (struct object *) filter, ""); + ref_list.revs.limited = 1; + prepare_revision_walk(&ref_list.revs); + } qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp); detached = (detached && (kinds & REF_LOCAL_BRANCH)); - if (detached && has_commit(head_sha1, with_commit)) { + if (detached && head_commit && has_commit(head_commit, with_commit)) { struct ref_item item; item.name = xstrdup("(no branch)"); item.kind = REF_LOCAL_BRANCH; - hashcpy(item.sha1, head_sha1); + item.commit = head_commit; if (strlen(item.name) > ref_list.maxwidth) - ref_list.maxwidth = strlen(item.name); + ref_list.maxwidth = strlen(item.name); print_ref_item(&item, ref_list.maxwidth, verbose, abbrev, 1); free(item.name); } -- 2.26.2