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Merge branch 'rs/pop-recent-commit-with-prio-queue'

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The pop_most_recent_commit() function can have quite expensive
worst case performance characteristics, which has been optimized by
using prio-queue data structure.

* rs/pop-recent-commit-with-prio-queue:
  commit: use prio_queue_replace() in pop_most_recent_commit()
  prio-queue: add prio_queue_replace()
  commit: convert pop_most_recent_commit() to prio_queue
This commit is contained in:
Junio C Hamano
2025-07-28 12:02:34 -07:00
parent e4ef0485fd a79e3519d6
commit 0f6e5037d4
10 changed files with 170 additions and 34 deletions
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14
commit.c
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@@ -31,6 +31,7 @@
#include "parse.h"
#include "object-file.h"
#include "object-file-convert.h"
#include "prio-queue.h"
static struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **);
@@ -739,20 +740,27 @@ void commit_list_sort_by_date(struct commit_list **list)
commit_list_sort(list, commit_list_compare_by_date);
}
struct commit *pop_most_recent_commit(struct commit_list **list,
struct commit *pop_most_recent_commit(struct prio_queue *queue,
unsigned int mark)
{
struct commit *ret = pop_commit(list);
struct commit *ret = prio_queue_peek(queue);
int get_pending = 1;
struct commit_list *parents = ret->parents;
while (parents) {
struct commit *commit = parents->item;
if (!repo_parse_commit(the_repository, commit) && !(commit->object.flags & mark)) {
commit->object.flags |= mark;
commit_list_insert_by_date(commit, list);
if (get_pending)
prio_queue_replace(queue, commit);
else
prio_queue_put(queue, commit);
get_pending = 0;
}
parents = parents->next;
}
if (get_pending)
prio_queue_get(queue);
return ret;
}