diff --git a/builtin/checkout.c b/builtin/checkout.c
index 9d8a69331adbd7..1f3b738e2c812d 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -632,7 +632,10 @@ static int merge_working_tree(const struct checkout_opts *opts,
 		tree = parse_tree_indirect(&new_branch_info->commit->object.oid);
 		init_tree_desc(&trees[1], tree->buffer, tree->size);
 
+		trace2_region_enter("unpack-trees", "checkout", the_repository);
 		ret = unpack_trees(2, trees, &topts);
+		trace2_region_leave("unpack-trees", "checkout", the_repository);
+
 		clear_unpack_trees_porcelain(&topts);
 		if (ret == -1) {
 			/*
diff --git a/builtin/rebase.c b/builtin/rebase.c
index 2fc253e7b21922..adfd0cf0efb943 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -387,7 +387,7 @@ static int reset_head(struct object_id *oid, const char *action,
 	size_t prefix_len;
 	struct object_id *orig = NULL, oid_orig,
 		*old_orig = NULL, oid_old_orig;
-	int ret = 0, nr = 0;
+	int ret = 0, nr = 0, unpack_trees_result;
 
 	if (switch_to_branch && !starts_with(switch_to_branch, "refs/"))
 		BUG("Not a fully qualified branch: '%s'", switch_to_branch);
@@ -435,7 +435,11 @@ static int reset_head(struct object_id *oid, const char *action,
 		goto leave_reset_head;
 	}
 
-	if (unpack_trees(nr, desc, &unpack_tree_opts)) {
+	trace2_region_enter("unpack-trees", "rebase", the_repository);
+	unpack_trees_result = unpack_trees(nr, desc, &unpack_tree_opts);
+	trace2_region_leave("unpack-trees", "rebase", the_repository);
+	
+	if (unpack_trees_result) {
 		ret = -1;
 		goto leave_reset_head;
 	}
diff --git a/merge-recursive.c b/merge-recursive.c
index 5938f4517ed72b..2495eb40ff03b4 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -389,7 +389,10 @@ static int unpack_trees_start(struct merge_options *o,
 	init_tree_desc_from_tree(t+1, head);
 	init_tree_desc_from_tree(t+2, merge);
 
+	trace2_region_enter("unpack-trees", "merge-recursive", the_repository);
 	rc = unpack_trees(3, t, &o->unpack_opts);
+	trace2_region_leave("unpack-trees", "merge-recursive", the_repository);
+
 	cache_tree_free(&active_cache_tree);
 
 	/*
diff --git a/merge.c b/merge.c
index 91008f760223e4..a022adc273c0f5 100644
--- a/merge.c
+++ b/merge.c
@@ -52,7 +52,7 @@ int checkout_fast_forward(struct repository *r,
 	struct tree *trees[MAX_UNPACK_TREES];
 	struct unpack_trees_options opts;
 	struct tree_desc t[MAX_UNPACK_TREES];
-	int i, nr_trees = 0;
+	int i, nr_trees = 0, unpack_trees_result;
 	struct dir_struct dir;
 	struct lock_file lock_file = LOCK_INIT;
 
@@ -96,7 +96,11 @@ int checkout_fast_forward(struct repository *r,
 	opts.fn = twoway_merge;
 	setup_unpack_trees_porcelain(&opts, "merge");
 
-	if (unpack_trees(nr_trees, t, &opts)) {
+	trace2_region_enter("unpack-trees", "merge", r);
+	unpack_trees_result = unpack_trees(nr_trees, t, &opts);
+	trace2_region_leave("unpack-trees", "merge", r);
+
+	if (unpack_trees_result) {
 		rollback_lock_file(&lock_file);
 		clear_unpack_trees_porcelain(&opts);
 		return -1;
diff --git a/sequencer.c b/sequencer.c
index 4eaa265cc4161c..d9f87ea2886508 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -2941,7 +2941,7 @@ static int do_reset(const char *name, int len, struct replay_opts *opts)
 	struct tree_desc desc;
 	struct tree *tree;
 	struct unpack_trees_options unpack_tree_opts;
-	int ret = 0;
+	int ret = 0, unpack_trees_result;
 
 	if (hold_locked_index(&lock, LOCK_REPORT_ON_ERROR) < 0)
 		return -1;
@@ -3002,7 +3002,11 @@ static int do_reset(const char *name, int len, struct replay_opts *opts)
 		return -1;
 	}
 
-	if (unpack_trees(1, &desc, &unpack_tree_opts)) {
+	trace2_region_enter("unpack-trees", "sequencer", the_repository);
+	unpack_trees_result = unpack_trees(1, &desc, &unpack_tree_opts);
+	trace2_region_leave("unpack-trees", "sequencer", the_repository);
+
+	if (unpack_trees_result) {
 		rollback_lock_file(&lock);
 		free((void *)desc.buffer);
 		strbuf_release(&ref_name);