Merge branch 'ps/reftable-iteration-perf'

The code to iterate over refs with the reftable backend has seen
some optimization.

* ps/reftable-iteration-perf:
  reftable/reader: add comments to `table_iter_next()`
  reftable/record: don't try to reallocate ref record name
  reftable/block: swap buffers instead of copying
  reftable/pq: allocation-less comparison of entry keys
  reftable/merged: skip comparison for records of the same subiter
  reftable/merged: allocation-less dropping of shadowed records
  reftable/record: introduce function to compare records by key

1 files changed, 1 insertions, 2 deletions

diff --git a/reftable/block.c b/reftable/block.c
index ce8a7d24f3..72eb73b380 100644
--- a/reftable/block.c
+++ b/reftable/block.c
@@ -339,8 +339,7 @@ int block_iter_next(struct block_iter *it, struct reftable_record *rec)
 		return -1;
 	string_view_consume(&in, n);
 
-	strbuf_reset(&it->last_key);
-	strbuf_addbuf(&it->last_key, &it->key);
+	strbuf_swap(&it->last_key, &it->key);
 	it->next_off += start.len - in.len;
 	return 0;
 }