From 02c1f4d72a4cc939942663c2de6759345fefdfe9 Mon Sep 17 00:00:00 2001
From: Urs Brogle <ub@picturepark.com>
Date: Sat, 15 Feb 2020 23:05:47 +0100
Subject: [PATCH] Add field caching to avoid out of memory exception.

---
 src/services/models/Schema.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/services/models/Schema.ts b/src/services/models/Schema.ts
index 7fb5a8e9..8f2d6004 100644
--- a/src/services/models/Schema.ts
+++ b/src/services/models/Schema.ts
@@ -275,12 +275,17 @@ export class SchemaModel {
   }
 }
 
+const fieldCache: { [index: string]: FieldModel[] } = {};
+
 function buildFields(
   parser: OpenAPIParser,
   schema: OpenAPISchema,
   $ref: string,
   options: RedocNormalizedOptions,
 ): FieldModel[] {
+  if (fieldCache[$ref]) {
+    return fieldCache[$ref];
+  }
   const props = schema.properties || {};
   const additionalProps = schema.additionalProperties;
   const defaults = schema.default || {};
@@ -339,6 +344,8 @@ function buildFields(
     );
   }
 
+  fieldCache[$ref] = fields;
+
   return fields;
 }