Index: trunk/psLib/test/math/tap_psStatsTiming.c
===================================================================
--- trunk/psLib/test/math/tap_psStatsTiming.c	(revision 10550)
+++ trunk/psLib/test/math/tap_psStatsTiming.c	(revision 10774)
@@ -120,4 +120,33 @@
     }
 
+    // test stat sample mean (mask, range : small sample)
+    {
+        psMemId id = psMemGetId();
+
+        psStats *stats = psStatsAlloc (PS_STAT_SAMPLE_MEAN | PS_STAT_USE_RANGE);
+        stats->min = -10;
+        stats->max = +10;
+        psVector *mask = psVectorAlloc (10, PS_TYPE_U8);
+        psVectorInit (mask, 0);
+        mask->data.U8[3] = 1;
+        int nOld = rnd->n;
+
+        rnd->n = 10;
+        gettimeofday (&start, NULL);
+        for (int i = 0; i < 1000000; i++)
+        {
+            psVectorStats (stats, rnd, NULL, mask, 1);
+        }
+        gettimeofday (&mark, NULL);
+        rnd->n = nOld;
+
+        psF64 delta = DTIME(mark, start);
+        ok (delta < 0.2, "sample mean %f (mask: 1, range: 1): %.3f sec", stats->sampleMean, delta);
+        psFree (stats);
+        psFree (mask);
+
+        ok(!psMemCheckLeaks (id, NULL, NULL, false), "no memory leaks");
+    }
+
     diag ("timing for sample median");
     /********** SAMPLE MEDIAN ***********/
@@ -300,4 +329,33 @@
         }
         gettimeofday (&mark, NULL);
+        psF64 delta = DTIME(mark, start);
+        ok (delta < 0.42, "sample stdev %f (mask: 1, range: 1): %.3f sec", stats->sampleStdev, delta);
+        psFree (stats);
+        psFree (mask);
+
+        ok(!psMemCheckLeaks (id, NULL, NULL, false), "no memory leaks");
+    }
+
+    // test stat sample stdev (mask, range)
+    {
+        psMemId id = psMemGetId();
+
+        psStats *stats = psStatsAlloc (PS_STAT_SAMPLE_STDEV | PS_STAT_USE_RANGE);
+        stats->min = -10;
+        stats->max = +10;
+        psVector *mask = psVectorAlloc (10, PS_TYPE_U8);
+        psVectorInit (mask, 0);
+        mask->data.U8[1] = 1;
+        int nOld = rnd->n;
+
+        rnd->n = 10;
+        gettimeofday (&start, NULL);
+        for (int i = 0; i < 1000000; i++)
+        {
+            psVectorStats (stats, rnd, NULL, mask, 1);
+        }
+        gettimeofday (&mark, NULL);
+        rnd->n = nOld;
+
         psF64 delta = DTIME(mark, start);
         ok (delta < 0.42, "sample stdev %f (mask: 1, range: 1): %.3f sec", stats->sampleStdev, delta);