diff --git a/plugins/UiConfig/media/js/all.js b/plugins/UiConfig/media/js/all.js
index 4bf524e0..68fe5268 100644
--- a/plugins/UiConfig/media/js/all.js
+++ b/plugins/UiConfig/media/js/all.js
@@ -1464,7 +1464,7 @@
         })(this)
       });
       section = this.createSection("Performance");
-      return section.items.push({
+      section.items.push({
         key: "log_level",
         title: "Level of logging to file",
         type: "select",
@@ -1481,6 +1481,64 @@
           }
         ]
       });
+      section.items.push({
+        key: "threads_fs_read",
+        title: "Threads for async file system reads",
+        type: "select",
+        options: [
+          {
+            title: "Sync read",
+            value: 0
+          }, {
+            title: "1 thread",
+            value: 1
+          }, {
+            title: "2 threads",
+            value: 2
+          }, {
+            title: "3 threads",
+            value: 3
+          }, {
+            title: "4 threads",
+            value: 4
+          }, {
+            title: "5 threads",
+            value: 5
+          }, {
+            title: "10 threads",
+            value: 10
+          }
+        ]
+      });
+      return section.items.push({
+        key: "threads_fs_write",
+        title: "Threads for async file system writes",
+        type: "select",
+        options: [
+          {
+            title: "Sync write",
+            value: 0
+          }, {
+            title: "1 thread",
+            value: 1
+          }, {
+            title: "2 threads",
+            value: 2
+          }, {
+            title: "3 threads",
+            value: 3
+          }, {
+            title: "4 threads",
+            value: 4
+          }, {
+            title: "5 threads",
+            value: 5
+          }, {
+            title: "10 threads",
+            value: 10
+          }
+        ]
+      });
     };
 
     ConfigStorage.prototype.createSection = function(title) {
@@ -1689,7 +1747,7 @@
       }, item.options.map((function(_this) {
         return function(option) {
           return h("option", {
-            selected: option.value === _this.values[item.key],
+            selected: option.value.toString() === _this.values[item.key],
             value: option.value
           }, option.title);
         };