From 2cca33ae3a46246c8c3c0ad8bf7111f5def3c405 Mon Sep 17 00:00:00 2001
From: mjgp2 <matthew.painter@import.io>
Date: Tue, 7 Jun 2022 12:06:51 +0100
Subject: [PATCH] fix(core): Fix stripProtoKeys performance

---
 packages/common/pipes/validation.pipe.ts | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

diff --git a/packages/common/pipes/validation.pipe.ts b/packages/common/pipes/validation.pipe.ts
index 65d88ed4a57..8622fdcd287 100644
--- a/packages/common/pipes/validation.pipe.ts
+++ b/packages/common/pipes/validation.pipe.ts
@@ -1,4 +1,5 @@
 import { iterate } from 'iterare';
+import { isTypedArray } from 'util/types';
 import { Optional } from '../decorators';
 import { Injectable } from '../decorators/core';
 import { HttpStatus } from '../enums/http-status.enum';
@@ -190,12 +191,25 @@ export class ValidationPipe implements PipeTransform<any> {
     return isNil(value) ? {} : value;
   }
 
-  protected stripProtoKeys(value: Record<string, any>) {
+  protected stripProtoKeys(value: any) {
+    if ( isTypedArray(value) ) {
+      return;
+    }
+    if ( Array.isArray(value) ) {
+      for ( const v of value ) {
+        if ( typeof v === 'object' ) {
+          this.stripProtoKeys(v);
+        }
+      }
+      return;
+    }
     delete value.__proto__;
-    const keys = Object.keys(value);
-    iterate(keys)
-      .filter(key => isObject(value[key]) && value[key])
-      .forEach(key => this.stripProtoKeys(value[key]));
+    for ( const key in value ) {
+      const v = value[key];
+      if ( typeof v === 'object' ) {
+        this.stripProtoKeys(v);
+      }
+    }
   }
 
   protected isPrimitive(value: unknown): boolean {