--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/arrays/DeletedRangeArrayFilter.java	Wed Jul 05 20:02:40 2017 +0200
+++ b/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/arrays/DeletedRangeArrayFilter.java	Fri Sep 26 18:47:20 2014 +0200
@@ -45,7 +45,7 @@
         if(hi < SparseArrayData.MAX_DENSE_LENGTH || underlying instanceof SparseArrayData) {
             return underlying;
         }
-        return new SparseArrayData(underlying, underlying.length());
+        return new SparseArrayData(underlying, underlying.length);
     }
 
     private boolean isEmpty() {
@@ -93,7 +93,7 @@
 
     @Override
     public ArrayData ensure(final long safeIndex) {
-        if (safeIndex >= SparseArrayData.MAX_DENSE_LENGTH && safeIndex >= length()) {
+        if (safeIndex >= SparseArrayData.MAX_DENSE_LENGTH && safeIndex >= length) {
             return new SparseArrayData(this, safeIndex + 1);
         }
 
@@ -110,8 +110,9 @@
     @Override
     public ArrayData shiftRight(final int by) {
         super.shiftRight(by);
-        lo = Math.min(length(), lo + by);
-        hi = Math.min(length() - 1, hi + by);
+        final long len = length;
+        lo = Math.min(len, lo + by);
+        hi = Math.min(len - 1, hi + by);
 
         return isEmpty() ? getUnderlying() : this;
     }
@@ -237,7 +238,7 @@
 
     @Override
     public Object pop() {
-        final int index = (int)(length() - 1);
+        final int index = (int)length - 1;
         if (super.has(index)) {
             final boolean isDeleted = isDeleted(index);
             final Object value      = super.pop();