diff --git a/marginalia_nu/src/main/java/nu/marginalia/util/array/algo/IntArrayBase.java b/marginalia_nu/src/main/java/nu/marginalia/util/array/algo/IntArrayBase.java
index bf5249a6..94e462b7 100644
--- a/marginalia_nu/src/main/java/nu/marginalia/util/array/algo/IntArrayBase.java
+++ b/marginalia_nu/src/main/java/nu/marginalia/util/array/algo/IntArrayBase.java
@@ -18,22 +18,14 @@ public interface IntArrayBase extends BulkTransferArray<IntBuffer> {
         }
     }
 
-    default void increment(long pos) {
-        set(pos, get(pos) + 1);
-    }
-
     default void swap(long pos1, long pos2) {
         int tmp = get(pos1);
         set(pos1, get(pos2));
         set(pos2, tmp);
     }
 
-    default void swapn(int n, long pos1, long pos2) {
-        for (int i = 0; i < n; i++) {
-            int tmp = get(pos1+i);
-            set(pos1+i, get(pos2+i));
-            set(pos2+i, tmp);
-        }
+    default void increment(long pos) {
+        set(pos, get(pos) + 1);
     }
 
     default int getAndIncrement(long pos) {
@@ -47,6 +39,7 @@ public interface IntArrayBase extends BulkTransferArray<IntBuffer> {
             set(start+i, buffer.get(i + bufferStart));
         }
     }
+
     default void get(long start, long end, IntBuffer buffer, int bufferStart) {
         for (int i = 0; i < (end-start); i++) {
             buffer.put(i + bufferStart, get(start + i));
diff --git a/marginalia_nu/src/main/java/nu/marginalia/util/array/algo/LongArrayBase.java b/marginalia_nu/src/main/java/nu/marginalia/util/array/algo/LongArrayBase.java
index 508fdf9a..216e089b 100644
--- a/marginalia_nu/src/main/java/nu/marginalia/util/array/algo/LongArrayBase.java
+++ b/marginalia_nu/src/main/java/nu/marginalia/util/array/algo/LongArrayBase.java
@@ -28,6 +28,7 @@ public interface LongArrayBase extends BulkTransferArray<LongBuffer> {
         set(pos2, tmp);
     }
 
+    /** Behavior not defined for overlapping ranges */
     default void swapn(int n, long pos1, long pos2) {
         for (int i = 0; i < n; i++) {
             long tmp = get(pos1+i);
diff --git a/marginalia_nu/src/main/java/nu/marginalia/util/array/page/PagingIntArray.java b/marginalia_nu/src/main/java/nu/marginalia/util/array/page/PagingIntArray.java
index b5f9b48d..6b44fecb 100644
--- a/marginalia_nu/src/main/java/nu/marginalia/util/array/page/PagingIntArray.java
+++ b/marginalia_nu/src/main/java/nu/marginalia/util/array/page/PagingIntArray.java
@@ -114,6 +114,11 @@ public class PagingIntArray extends AbstractPagingArray<IntArrayPage, IntBuffer>
         }
     }
 
+    @Override
+    public int getAndIncrement(long pos) {
+        return pages[partitioningScheme.getPage(pos)].getAndIncrement(partitioningScheme.getOffset(pos));
+    }
+
     @Override
     public void get(long start, long end, int[] buffer) {
         if (partitioningScheme.isSamePage(start, end)) {
diff --git a/marginalia_nu/src/main/java/nu/marginalia/util/array/page/PagingLongArray.java b/marginalia_nu/src/main/java/nu/marginalia/util/array/page/PagingLongArray.java
index 1180126a..597979ef 100644
--- a/marginalia_nu/src/main/java/nu/marginalia/util/array/page/PagingLongArray.java
+++ b/marginalia_nu/src/main/java/nu/marginalia/util/array/page/PagingLongArray.java
@@ -119,6 +119,11 @@ public class PagingLongArray extends AbstractPagingArray<LongArrayPage, LongBuff
         }
     }
 
+    @Override
+    public long getAndIncrement(long pos) {
+        return pages[partitioningScheme.getPage(pos)].getAndIncrement(partitioningScheme.getOffset(pos));
+    }
+
     @Override
     public void set(long pos, long value) {
         int page = partitioningScheme.getPage(pos);