[Bigdata-commit] SF.net SVN: bigdata:[7876] branches/BIGDATA_RELEASE_1_3_0/bigdata-rdf/src/ java/com/bigdata/rdf/sparql/ast/eval/ASTEvalHelper.java

[<tho...@us...>]

Revision: 7876
          http://sourceforge.net/p/bigdata/code/7876
Author:   thompsonbry
Date:     2014-02-23 12:15:58 +0000 (Sun, 23 Feb 2014)
Log Message:
-----------
replaced ConcurrentSkipList with Collections.newSetFromMap() per feedback on possible performance impact from the skip list.

Modified Paths:
--------------
    branches/BIGDATA_RELEASE_1_3_0/bigdata-rdf/src/java/com/bigdata/rdf/sparql/ast/eval/ASTEvalHelper.java

Modified: branches/BIGDATA_RELEASE_1_3_0/bigdata-rdf/src/java/com/bigdata/rdf/sparql/ast/eval/ASTEvalHelper.java
===================================================================
--- branches/BIGDATA_RELEASE_1_3_0/bigdata-rdf/src/java/com/bigdata/rdf/sparql/ast/eval/ASTEvalHelper.java	2014-02-23 00:21:30 UTC (rev 7875)
+++ branches/BIGDATA_RELEASE_1_3_0/bigdata-rdf/src/java/com/bigdata/rdf/sparql/ast/eval/ASTEvalHelper.java	2014-02-23 12:15:58 UTC (rev 7876)
@@ -29,6 +29,7 @@
 
 import info.aduna.iteration.CloseableIteration;
 
+import java.util.Collections;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
@@ -36,7 +37,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
-import java.util.concurrent.ConcurrentSkipListSet;
+import java.util.concurrent.ConcurrentHashMap;
 
 import org.apache.log4j.Logger;
 import org.apache.log4j.MDC;
@@ -540,8 +541,9 @@
              */
      
             // Concurrency safe set.
-            describedResources = new ConcurrentSkipListSet<BigdataValue>();
-            
+            describedResources = Collections
+                    .newSetFromMap(new ConcurrentHashMap<BigdataValue, Boolean>());
+
             // Collect the bindings on those variables.
             solutions2 = new DescribeBindingsCollector(//
                     describeVars,// what to collect

This was sent by the SourceForge.net collaborative development platform, the world's largest Open Source development site.