From d8ba30b91b16cc110d3b6d1ff0366780750fee01 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Koch-Kramer?= <koch-kramer@web.de>
Date: Mon, 13 Jan 2020 19:56:50 +0100
Subject: [PATCH] Speed up accessing property `comments` of `Post`

This has been asked for in #436.
---
 instaloader/structures.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/instaloader/structures.py b/instaloader/structures.py
index 824cabf..f97aa5e 100644
--- a/instaloader/structures.py
+++ b/instaloader/structures.py
@@ -325,6 +325,11 @@ class Post:
     @property
     def comments(self) -> int:
         """Comment count including answers"""
+        # If the count is already present in `self._node`, do not use `self._field` which could trigger fetching the
+        # full metadata dict.
+        comments = self._node.get('edge_media_to_comment')
+        if comments and 'count' in comments:
+            return comments['count']
         try:
             return self._field('edge_media_to_parent_comment', 'count')
         except KeyError: