From 0aab1bdb1f18bdb60ca08ad80f687dc6e1351358 Mon Sep 17 00:00:00 2001
From: Henrik Edin <henrik.edin@mongodb.com>
Date: Fri, 10 Apr 2020 10:19:09 -0400
Subject: SERVER-47416 Eliminate copies of KeyStringSet when possible

Also reusing memory for temporary data structure in KeyString generation for arrays.
---
 src/mongo/db/index/wildcard_access_method.cpp | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'src/mongo/db/index/wildcard_access_method.cpp')

diff --git a/src/mongo/db/index/wildcard_access_method.cpp b/src/mongo/db/index/wildcard_access_method.cpp
index 5948ef53a6d..cedc074c7cb 100644
--- a/src/mongo/db/index/wildcard_access_method.cpp
+++ b/src/mongo/db/index/wildcard_access_method.cpp
@@ -46,10 +46,9 @@ WildcardAccessMethod::WildcardAccessMethod(IndexCatalogEntry* wildcardState,
               getSortedDataInterface()->getKeyStringVersion(),
               getSortedDataInterface()->getOrdering()) {}
 
-bool WildcardAccessMethod::shouldMarkIndexAsMultikey(
-    size_t numberOfKeys,
-    const std::vector<KeyString::Value>& multikeyMetadataKeys,
-    const MultikeyPaths& multikeyPaths) const {
+bool WildcardAccessMethod::shouldMarkIndexAsMultikey(size_t numberOfKeys,
+                                                     const KeyStringSet& multikeyMetadataKeys,
+                                                     const MultikeyPaths& multikeyPaths) const {
     return !multikeyMetadataKeys.empty();
 }
 
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