From ef30e36fbdd3073a07227f6597b9456bd793fee1 Mon Sep 17 00:00:00 2001
From: Rudolf Meijering <skaapgif@gmail.com>
Date: Thu, 4 Jun 2020 10:26:17 +0200
Subject: [PATCH] Cache migrator.getActiveMappings to improve createRepository

---
 .../saved_objects/migrations/kibana/kibana_migrator.ts      | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/core/server/saved_objects/migrations/kibana/kibana_migrator.ts b/src/core/server/saved_objects/migrations/kibana/kibana_migrator.ts
index 4f69d45c192e9..69b57a498936e 100644
--- a/src/core/server/saved_objects/migrations/kibana/kibana_migrator.ts
+++ b/src/core/server/saved_objects/migrations/kibana/kibana_migrator.ts
@@ -74,6 +74,7 @@ export class KibanaMigrator {
   private readonly status$ = new BehaviorSubject<KibanaMigratorStatus>({
     status: 'waiting',
   });
+  private readonly activeMappings: IndexMapping;
 
   /**
    * Creates an instance of KibanaMigrator.
@@ -100,6 +101,9 @@ export class KibanaMigrator {
       validateDoc: docValidator(savedObjectValidations || {}),
       log: this.log,
     });
+    // Building the active mappings (and associated md5sums) is an expensive
+    // operation so we cache the result
+    this.activeMappings = buildActiveMappings(this.mappingProperties);
   }
 
   /**
@@ -172,7 +176,7 @@ export class KibanaMigrator {
    *
    */
   public getActiveMappings(): IndexMapping {
-    return buildActiveMappings(this.mappingProperties);
+    return this.activeMappings;
   }
 
   /**