add TODO

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene4547@1439918 13f79535-47bb-0310-9956-ffa450edef68
2013-01-29 14:52:41 +00:00 · 2013-01-29 14:52:41 +00:00 · 2212440b3b
parent fa35092734
commit 2212440b3b
1 changed files with 1 additions and 0 deletions
--- a/lucene/core/src/java/org/apache/lucene/util/packed/AppendingLongBuffer.java
+++ b/lucene/core/src/java/org/apache/lucene/util/packed/AppendingLongBuffer.java
@ -160,6 +160,7 @@ public class AppendingLongBuffer {
   * Return the number of bytes used by this instance.
   */
  public long ramBytesUsed() {
+    // TODO: this is called per-doc-per-norms/dv-field, can we optimize this?
    long bytesUsed = RamUsageEstimator.alignObjectSize(
        RamUsageEstimator.NUM_BYTES_OBJECT_HEADER
        + 3 * RamUsageEstimator.NUM_BYTES_OBJECT_REF // the 3 arrays