diff --git a/dbtests/perftests.cpp b/dbtests/perftests.cpp
index b8326b7cc84..a5da27d087e 100644
--- a/dbtests/perftests.cpp
+++ b/dbtests/perftests.cpp
@@ -286,10 +286,24 @@ namespace PerfTests {
         }
     };
 
+    // if a test is this fast, it was optimized out
+    class Dummy : public B {
+    public:
+        Dummy() { }
+        virtual int howLongMillis() { return 4000; } 
+        string name() { return "dummy"; }
+        void timed() {
+            dontOptimizeOutHopefully++;
+        }
+        unsigned long long expectation() { return 1000000; }
+        virtual bool showDurStats() { return false; }
+    };
+
     // test thread local speed
     class TLS : public B {
     public:
         TLS() { }
+        virtual int howLongMillis() { return 4000; } 
         string name() { return "thread-local-storage"; }
         void timed() {
             if( &cc() )
@@ -299,6 +313,20 @@ namespace PerfTests {
         virtual bool showDurStats() { return false; }
     };
 
+    class Malloc : public B {
+    public:
+        Malloc() { }
+        virtual int howLongMillis() { return 4000; } 
+        string name() { return "malloc"; }
+        void timed() {
+            char *p = new char[128];
+            if( dontOptimizeOutHopefully++ > 0 )
+                delete p;
+        }
+        unsigned long long expectation() { return 1000000; }
+        virtual bool showDurStats() { return false; }
+    };
+
     // test speed of checksum method
     class ChecksumTest : public B {
     public:
@@ -522,10 +550,12 @@ namespace PerfTests {
             cout
                 << "stats test                              rps        time   "
                 << dur::stats.curr->_CSVHeader() << endl;
+            add< Dummy >();
+            add< TLS >();
+            add< Malloc >();
             add< BSONIter >();
             add< ChecksumTest >();
             add< TaskQueueTest >();
-            add< TLS >();
             add< InsertDup >();
             add< Insert1 >();
             add< InsertRandom >();
diff --git a/jstests/capped2.js b/jstests/capped2.js
index b55913d5045..1f8bf1d01c6 100644
--- a/jstests/capped2.js
+++ b/jstests/capped2.js
@@ -8,7 +8,7 @@ function debug( x ) {
 
 var val = new Array( 2000 );
 var c = "";
-for( i = 0; i < 2000; ++i, c += "---" ) {
+for( i = 0; i < 2000; ++i, c += "---" ) { // bigger and bigger objects through the array...
     val[ i ] = { a: c };
 }