From 34a53b9f5df4909d7e306a9f070994093f392cd3 Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Sat, 17 Aug 2019 11:06:27 +0200
Subject: [PATCH] Inline the `isRef` checks in the various `XRef.fetch` related
 methods

The relevant methods are usually not hot enough for these changes to have an easily measurable effect, however there's been a lot of other cases where similiar inlining has helped performance. (And these changes may help offset the changes made in the next patch.)
---
 src/core/obj.js | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/core/obj.js b/src/core/obj.js
index 4de709ced..3446f8821 100644
--- a/src/core/obj.js
+++ b/src/core/obj.js
@@ -1626,14 +1626,14 @@ var XRef = (function XRefClosure() {
     },
 
     fetchIfRef: function XRef_fetchIfRef(obj, suppressEncryption) {
-      if (!isRef(obj)) {
-        return obj;
+      if (obj instanceof Ref) {
+        return this.fetch(obj, suppressEncryption);
       }
-      return this.fetch(obj, suppressEncryption);
+      return obj;
     },
 
     fetch: function XRef_fetch(ref, suppressEncryption) {
-      if (!isRef(ref)) {
+      if (!(ref instanceof Ref)) {
         throw new Error('ref object is not a reference');
       }
       var num = ref.num;
@@ -1768,10 +1768,10 @@ var XRef = (function XRefClosure() {
     },
 
     async fetchIfRefAsync(obj, suppressEncryption) {
-      if (!isRef(obj)) {
-        return obj;
+      if (obj instanceof Ref) {
+        return this.fetchAsync(obj, suppressEncryption);
       }
-      return this.fetchAsync(obj, suppressEncryption);
+      return obj;
     },
 
     async fetchAsync(ref, suppressEncryption) {