From bbe7135ae42c88c509ab3fbe02fd0fafce4ea12c Mon Sep 17 00:00:00 2001
From: Andrew Kane <andrew@ankane.org>
Date: Thu, 8 May 2025 20:20:12 -0700
Subject: [PATCH] Added prefetching for HNSW [skip ci]

---
 src/hnswutils.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/hnswutils.c b/src/hnswutils.c
index c52d2c7..c509d4f 100644
--- a/src/hnswutils.c
+++ b/src/hnswutils.c
@@ -805,6 +805,9 @@ HnswLoadUnvisitedFromDisk(HnswElement element, HnswUnvisited * unvisited, int *u
 		if (!found)
 			unvisited[(*unvisitedLength)++].indextid = *indextid;
 	}
+
+	for (int i = 0; i < *unvisitedLength; i++)
+		PrefetchBuffer(index, MAIN_FORKNUM, ItemPointerGetBlockNumber(&unvisited[i].indextid));
 }
 
 /*