From f3d6309e36a29bf2392a8d4b2b269af77ddc3561 Mon Sep 17 00:00:00 2001
From: Christoph Wurst <christoph@winzerhof-wurst.at>
Date: Fri, 26 Apr 2024 15:38:29 +0200
Subject: [PATCH] perf(db): Sort data for IN before chunking

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>
---
 lib/private/Files/Cache/Cache.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/private/Files/Cache/Cache.php b/lib/private/Files/Cache/Cache.php
index 62e1e57a171..5267b8a8153 100644
--- a/lib/private/Files/Cache/Cache.php
+++ b/lib/private/Files/Cache/Cache.php
@@ -620,6 +620,9 @@ class Cache implements ICache {
 		$query->delete('filecache')
 			->whereParentInParameter('parentIds');
 
+		// Sorting before chunking allows the db to find the entries close to each
+		// other in the index
+		sort($parentIds, SORT_NUMERIC);
 		foreach (array_chunk($parentIds, 1000) as $parentIdChunk) {
 			$query->setParameter('parentIds', $parentIdChunk, IQueryBuilder::PARAM_INT_ARRAY);
 			$query->execute();