Fix: Performance issues when generating some thumbnails

Author: ollm

CHANGELOG.md

@@ -10,7 +10,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 - Delete bookmarks from the bookmark list [`3792f7d`](https://github.com/ollm/OpenComic/commit/3792f7db319cf885f398836aefe983e56fe5ef2a)
 - Save and show also the current folder progress apart from the main folder [`86f094b`](https://github.com/ollm/OpenComic/commit/86f094b7a216982ae7799950234be233113143e7)
-- Instead of the file name it shows the title of EPUB, PDF and Compressed Files with ComicInfo.xml
+- Instead of the file name it shows the title of EPUB, PDF and Compressed Files with ComicInfo.xml [`0d3e4ba`](https://github.com/ollm/OpenComic/commit/0d3e4ba489f616d862c4b52e2f2498f1a203d218)
 
 ##### 🐛 Bug Fixes
 
@@ -21,6 +21,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Blank page keep white color in dark theme [`8d1a5b7`](https://github.com/ollm/OpenComic/commit/8d1a5b741855fd0bae6a7efd9579c7ddecbfd3d1)
 - Open with OpenComic not working in macOS and some fixes in Windows and Linux [`ea90063`](https://github.com/ollm/OpenComic/commit/ea9006309eee995c92571e0bc4c919d50de8e55b)
 - Error opening an epub when OpenComic is closed [`84c838a`](https://github.com/ollm/OpenComic/commit/84c838a17a32b3f50e9b25bf016ea810c91d95e6)
+- Performance issues when generating some thumbnails
 
 ## [v1.0.0-beta.5](https://github.com/ollm/OpenComic/releases/tag/v1.0.0-beta.5) (24-11-2023)
 

scripts/cache.js

@@ -37,7 +37,7 @@ function processTheImageQueue()
 		{
 			processingTheImageQueue = false;
 
-			storage.set('cache', data);
+			storage.setThrottle('cache', data);
 		}
 
 	}).catch(function(){
@@ -56,7 +56,7 @@ function processTheImageQueue()
 		{
 			processingTheImageQueue = false;
 
-			storage.set('cache', data);
+			storage.setThrottle('cache', data);
 		}
 
 	});

scripts/storage.js

@@ -473,6 +473,36 @@ function push(key, item)
 	ejs.set(key, storageJson[key], function(error){});
 }
 
+var throttles = {};
+var debounces = {};
+
+// Improve save perfomance in places that do not require instantaneous save
+async function setThrottle(key)
+{
+	clearTimeout(throttles[key]);
+
+	throttles[key] = setTimeout(function(){
+
+		clearTimeout(debounces[key]);
+		debounces[key] = false;
+
+		ejs.set(key, storageJson[key], function(error){});
+
+	}, 300);
+
+	if(debounces[key] === undefined || debounces[key] === false)
+	{
+		debounces[key] = setTimeout(function(){
+
+			clearTimeout(throttles[key]);
+			debounces[key] = false;
+
+			ejs.set(key, storageJson[key], function(error){});
+
+		}, 3000);
+	}
+}
+
 var storageKeys = [];
 
 for(let key in storageDefault)
@@ -563,6 +593,7 @@ module.exports = {
 	updateVar: updateVar,
 	setVar: updateVar,
 	set: update,
+	setThrottle: setThrottle,
 	update: update,
 	push: push,
 	storageJson: storageJson,