diff --git a/inc/functions.php b/inc/functions.php
index ab43210b..5457cc5f 100644
--- a/inc/functions.php
+++ b/inc/functions.php
@@ -1690,6 +1690,14 @@ function buildIndex($global_api = "yes") {
 			if (!$content)
 				break;
 
+			if ($config['cache']['enabled']) {
+				$contentHash = md5(json_encode($content['threads']));
+				$cacheHit = cache::get('index_cache'. $contentHash);
+				if ($cacheHit)
+					continue;
+				cache::set('index_cache'. $contentHash, "processed", 3600);
+			}
+
 			// json api
 			if ($config['api']['enabled']) {
 				$threads = $content['threads'];