From 908ec0a25cad0727332b9d4a4261c4f41773038e Mon Sep 17 00:00:00 2001
From: Peter Velkov <kidroca@gmail.com>
Date: Tue, 13 Jul 2021 20:58:31 +0300
Subject: [PATCH] perf: Skip a write to storage when nothing is actually
 changing

This covers both `set` and `merge`
---
 lib/Onyx.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/Onyx.js b/lib/Onyx.js
index 6b662d5f..1e69e44a 100644
--- a/lib/Onyx.js
+++ b/lib/Onyx.js
@@ -527,6 +527,11 @@ function evictStorageAndRetry(error, ionMethod, ...args) {
  * @returns {Promise}
  */
 function set(key, val) {
+    // Skip writing to storage if the value hasn't changed
+    if (cache.hasCacheForKey(key) && _.isEqual(val, cache.getValue(key))) {
+        return Promise.resolve();
+    }
+
     // Adds the key to cache when it's not available
     cache.set(key, val);