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Merge branch 'jk/upload-pack-use-prio-queue'

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Code clean-up and performance improvement to reduce use of
timestamp-ordered commit-list by replacing it with a priority
queue.

* jk/upload-pack-use-prio-queue:
  upload-pack: use priority queue in reachable() check
This commit is contained in:
Junio C Hamano 2016-10-26 13:14:46 -07:00
commit 03513c8990
1 changed files with 7 additions and 6 deletions
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13
upload-pack.c
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@ -16,6 +16,7 @@
#include "string-list.h"
#include "parse-options.h"
#include "argv-array.h"
#include "prio-queue.h"
static const char * const upload_pack_usage[] = {
N_("git upload-pack [<options>] <dir>"),
@ -319,12 +320,12 @@ static int got_sha1(const char *hex, unsigned char *sha1)
static int reachable(struct commit *want)
{
struct commit_list *work = NULL;
struct prio_queue work = { compare_commits_by_commit_date };
commit_list_insert_by_date(want, &work);
while (work) {
prio_queue_put(&work, want);
while (work.nr) {
struct commit_list *list;
struct commit *commit = pop_commit(&work);
struct commit *commit = prio_queue_get(&work);
if (commit->object.flags & THEY_HAVE) {
want->object.flags |= COMMON_KNOWN;
@ -340,12 +341,12 @@ static int reachable(struct commit *want)
for (list = commit->parents; list; list = list->next) {
struct commit *parent = list->item;
if (!(parent->object.flags & REACHABLE))
commit_list_insert_by_date(parent, &work);
prio_queue_put(&work, parent);
}
}
want->object.flags |= REACHABLE;
clear_commit_marks(want, REACHABLE);
free_commit_list(work);
clear_prio_queue(&work);
return (want->object.flags & COMMON_KNOWN);
}