From 72271c0d1f7d9ee0c66660904a877cc0a1c5f04c Mon Sep 17 00:00:00 2001
From: Yuya Nishihara <yuya@tcha.org>
Date: Sat, 20 May 2023 08:25:41 +0900
Subject: [PATCH] repo: micro-optimize add_head() to not instantiate indexed
 commit object

---
 lib/src/repo.rs | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/src/repo.rs b/lib/src/repo.rs
index 69c7837b0..227070814 100644
--- a/lib/src/repo.rs
+++ b/lib/src/repo.rs
@@ -935,9 +935,10 @@ impl MutableRepo {
                 |commit: &Commit| commit.id().clone(),
                 |commit: &Commit| -> Vec<Commit> {
                     commit
-                        .parents()
-                        .into_iter()
-                        .filter(|parent| !self.index().has_id(parent.id()))
+                        .parent_ids()
+                        .iter()
+                        .filter(|id| !self.index().has_id(id))
+                        .map(|id| self.store().get_commit(id).unwrap())
                         .collect()
                 },
             );