diff --git a/src/main/java/org/apache/sysds/runtime/frame/data/columns/Array.java b/src/main/java/org/apache/sysds/runtime/frame/data/columns/Array.java
index 75675693386..90fd99fc10f 100644
--- a/src/main/java/org/apache/sysds/runtime/frame/data/columns/Array.java
+++ b/src/main/java/org/apache/sysds/runtime/frame/data/columns/Array.java
@@ -40,6 +40,7 @@
 import org.apache.sysds.runtime.frame.data.columns.ArrayFactory.FrameArrayType;
 import org.apache.sysds.runtime.frame.data.compress.ArrayCompressionStatistics;
 import org.apache.sysds.runtime.matrix.data.Pair;
+import org.apache.sysds.utils.stats.Timing;
 
 /**
  * Generic, resizable native arrays for the internal representation of the columns in the FrameBlock. We use this custom
@@ -123,13 +124,20 @@ public synchronized final Map<T,Integer> getRecodeMap(int estimate, ExecutorServ
 	}
 
 	protected Map<T,Integer> createRecodeMap(int estimate, ExecutorService pool) {
-		// final Map<T,Integer> map = new HashMap<>((int)Math.min((long)estimate *2, size()));
+		Timing t = new Timing();
 		final int s = size();		
 		int k = OptimizerUtils.getTransformNumThreads();
+		Map<T,Integer> ret;
 		if(pool == null || s < 10000)
-			return createRecodeMap(estimate, 0, s);
+			ret =  createRecodeMap(estimate, 0, s);
 		else
-			return parallelCreateRecodeMap(estimate, pool, s, k);
+			ret = parallelCreateRecodeMap(estimate, pool, s, k);
+
+		if(LOG.isDebugEnabled()) {
+			String base = "CreateRecodeMap estimate: %10d actual %10d time: %10.5f";
+			LOG.debug(String.format(base, estimate, ret.size(), t.stop()));
+		}
+		return ret;
 	}
 
 	private Map<T,Integer> parallelCreateRecodeMap(int estimate,ExecutorService pool, final int s, int k) {