Slow down fast scrolling

app/src/main/java/androidx/recyclerview/widget/FastScrollerEx.java

@@ -464,12 +464,28 @@ public class FastScrollerEx extends RecyclerView.ItemDecoration implements Recyc
             int scrollbarLength = scrollbarRange[1] - scrollbarRange[0];
             float percentage = (scrollbarLength == 0 ? 0 : y / (float) scrollbarLength);
             int pos = Math.round(count * percentage);
-            mRecyclerView.scrollToPosition(pos);
+            scrollTo = pos;
+            mRecyclerView.removeCallbacks(scroll);
+            mRecyclerView.postDelayed(scroll, 100);
         }
 
         mVerticalDragY = y;
     }
 
+    private int scrollTo;
+
+    private final Runnable scroll = new Runnable() {
+        @Override
+        public void run() {
+            try {
+                eu.faircode.email.Log.i("Fast scroll to=" + scrollTo);
+                mRecyclerView.scrollToPosition(scrollTo);
+            } catch (Throwable ex) {
+                eu.faircode.email.Log.e(ex);
+            }
+        }
+    };
+
     private void horizontalScrollTo(float x) {
         final int[] scrollbarRange = getHorizontalRange();
         x = Math.max(scrollbarRange[0], Math.min(scrollbarRange[1], x));