filebackend: clean up some comments and remove unused FileBackendStoreOpHandle field

[lhc/web/wiklou.git] / includes / libs / HashRing.php

diff --git a/includes/libs/HashRing.php b/includes/libs/HashRing.php
index f8ab6a3..94413c2 100644 (file)
--- a/includes/libs/HashRing.php
+++ b/includes/libs/HashRing.php
@@ -129,6 +129,12 @@ class HashRing implements Serializable {
                        throw new InvalidArgumentException( "Invalid ring source specified." );
                }
 
+               // Short-circuit for the common single-location case. Note that if there was only one
+               // location and it was ejected from the live ring, getLiveRing() would have error out.
+               if ( count( $this->weightByLocation ) == 1 ) {
+                       return ( $limit > 0 ) ? [ $ring[0][self::KEY_LOCATION] ] : [];
+               }
+
                // Locate the node index for this item's position on the hash ring
                $itemIndex = $this->findNodeIndexForPosition( $this->getItemPosition( $item ), $ring );