diff --git a/trunk/conf/full.conf b/trunk/conf/full.conf
index de0ca04987..2e47826d51 100755
--- a/trunk/conf/full.conf
+++ b/trunk/conf/full.conf
@@ -165,8 +165,8 @@ vhost mrw.srs.com {
     # SRS always set mw on, so we just set the latency value.
     # the latency of stream >= mw_latency + mr_latency
     # the value recomment is [300, 1800]
-    # default: 350
-    mw_latency      350;
+    # default: 450
+    mw_latency      450;
 }
 
 # vhost for edge, edge and origin is the same vhost
diff --git a/trunk/src/core/srs_core.hpp b/trunk/src/core/srs_core.hpp
index 26c3c1f7cd..b7ea4e366a 100644
--- a/trunk/src/core/srs_core.hpp
+++ b/trunk/src/core/srs_core.hpp
@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR       2
 #define VERSION_MINOR       0
-#define VERSION_REVISION    66
+#define VERSION_REVISION    67
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"
 #define RTMP_SIG_SRS_ROLE "origin/edge server"
diff --git a/trunk/src/core/srs_core_performance.hpp b/trunk/src/core/srs_core_performance.hpp
index 4757c66e8e..2ac545e09e 100644
--- a/trunk/src/core/srs_core_performance.hpp
+++ b/trunk/src/core/srs_core_performance.hpp
@@ -95,7 +95,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *       2000            150         300
 */
 // the default config of mw.
-#define SRS_PERF_MW_SLEEP 350
+#define SRS_PERF_MW_SLEEP 450
 /**
 * use iovs cache in each msg,
 * for the shared ptr message, we calc once and used for every copy.
@@ -138,7 +138,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * whether enable the fast vector for qeueue.
 * @see https://github.com/winlinvip/simple-rtmp-server/issues/251
 */
-#undef SRS_PERF_QUEUE_FAST_VECTOR
+#define SRS_PERF_QUEUE_FAST_VECTOR
 #if defined(SRS_PERF_QUEUE_FAST_CACHE) && defined(SRS_PERF_QUEUE_FAST_VECTOR)
     #error "fast cache conflict with fast vector"
 #endif
@@ -147,7 +147,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * @remark this improve performance for large connectios.
 * @see https://github.com/winlinvip/simple-rtmp-server/issues/251
 */
-#undef SRS_PERF_QUEUE_COND_WAIT
+#define SRS_PERF_QUEUE_COND_WAIT
 #ifdef SRS_PERF_QUEUE_COND_WAIT
     #define SRS_PERF_MW_MIN_MSGS 8
 #endif