diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index ae8989084..335c11bf1 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -2930,7 +2930,6 @@ srs_error_t SrsConfig::check_number_connections()
         int nb_canbe = max_open_files - nb_consumed_fds - 1;
         
         // for each play connections, we open a pipe(2fds) to convert SrsConsumver to io,
-        // refine performance, @see: https://github.com/ossrs/srs/issues/194
         if (nb_total >= max_open_files) {
             srs_error("invalid max_connections=%d, required=%d, system limit to %d, "
                       "total=%d(max_connections=%d, nb_consumed_fds=%d). "
diff --git a/trunk/src/app/srs_app_rtmp_conn.cpp b/trunk/src/app/srs_app_rtmp_conn.cpp
index cc7cc0b78..11f2cd48d 100644
--- a/trunk/src/app/srs_app_rtmp_conn.cpp
+++ b/trunk/src/app/srs_app_rtmp_conn.cpp
@@ -743,7 +743,6 @@ srs_error_t SrsRtmpConn::do_playing(SrsLiveSource* source, SrsLiveConsumer* cons
         
 #ifdef SRS_PERF_QUEUE_COND_WAIT
         // wait for message to incoming.
-        // @see https://github.com/ossrs/srs/issues/251
         // @see https://github.com/ossrs/srs/issues/257
         consumer->wait(mw_msgs, mw_sleep);
 #endif
diff --git a/trunk/src/app/srs_app_source.hpp b/trunk/src/app/srs_app_source.hpp
index 4f8e6d9b8..33a48f580 100644
--- a/trunk/src/app/srs_app_source.hpp
+++ b/trunk/src/app/srs_app_source.hpp
@@ -77,7 +77,6 @@ public:
 
 #ifdef SRS_PERF_QUEUE_FAST_VECTOR
 // To alloc and increase fixed space, fast remove and insert for msgs sender.
-// @see https://github.com/ossrs/srs/issues/251
 class SrsFastVector
 {
 private:
@@ -177,7 +176,6 @@ private:
     bool should_update_source_id;
 #ifdef SRS_PERF_QUEUE_COND_WAIT
     // The cond wait for mw.
-    // @see https://github.com/ossrs/srs/issues/251
     srs_cond_t mw_wait;
     bool mw_waiting;
     int mw_min_msgs;
diff --git a/trunk/src/core/srs_core_performance.hpp b/trunk/src/core/srs_core_performance.hpp
index ccef5b370..e91824fec 100644
--- a/trunk/src/core/srs_core_performance.hpp
+++ b/trunk/src/core/srs_core_performance.hpp
@@ -54,7 +54,6 @@
  * @remark this largely improve performance, from 3.5k+ to 7.5k+.
  *       the latency+ when cache+.
  * @remark the socket send buffer default to 185KB, it large enough.
- * @see https://github.com/ossrs/srs/issues/194
  * @see SrsConfig::get_mw_sleep_ms()
  * @remark the mw sleep and msgs to send, maybe:
  *       mw_sleep        msgs        iovs
@@ -89,24 +88,20 @@
 
 /**
  * whether set the socket send buffer size.
- * @see https://github.com/ossrs/srs/issues/251
  */
 #define SRS_PERF_MW_SO_SNDBUF
 
 /**
  * whether set the socket recv buffer size.
- * @see https://github.com/ossrs/srs/issues/251
  */
 #undef SRS_PERF_MW_SO_RCVBUF
 /**
  * whether enable the fast vector for qeueue.
- * @see https://github.com/ossrs/srs/issues/251
  */
 #define SRS_PERF_QUEUE_FAST_VECTOR
 /**
  * whether use cond wait to send messages.
  * @remark this improve performance for large connectios.
- * @see https://github.com/ossrs/srs/issues/251
  */
 // TODO: FIXME: Should always enable it.
 #define SRS_PERF_QUEUE_COND_WAIT
diff --git a/trunk/src/kernel/srs_kernel_consts.hpp b/trunk/src/kernel/srs_kernel_consts.hpp
index bde0761bf..ef87b5575 100644
--- a/trunk/src/kernel/srs_kernel_consts.hpp
+++ b/trunk/src/kernel/srs_kernel_consts.hpp
@@ -79,7 +79,6 @@
 #define SRS_CONSTS_RTMP_MAX_FMT3_HEADER_SIZE 5
 
 // For performance issue,
-// the iovs cache, @see https://github.com/ossrs/srs/issues/194
 // iovs cache for multiple messages for each connections.
 // suppose the chunk size is 64k, each message send in a chunk which needs only 2 iovec,
 // so the iovs max should be (SRS_PERF_MW_MSGS * 2)
@@ -87,7 +86,6 @@
 // @remark, SRS will realloc when the iovs not enough.
 #define SRS_CONSTS_IOVS_MAX (SRS_PERF_MW_MSGS * 2)
 // For performance issue,
-// the c0c3 cache, @see https://github.com/ossrs/srs/issues/194
 // c0c3 cache for multiple messages for each connections.
 // each c0 <= 16byes, suppose the chunk size is 64k,
 // each message send in a chunk which needs only a c0 header,
diff --git a/trunk/src/kernel/srs_kernel_flv.hpp b/trunk/src/kernel/srs_kernel_flv.hpp
index c9387b40c..053a622ee 100644
--- a/trunk/src/kernel/srs_kernel_flv.hpp
+++ b/trunk/src/kernel/srs_kernel_flv.hpp
@@ -250,7 +250,6 @@ class SrsSharedPtrMessage
 // 4.1. Message Header
 public:
     // The header can shared, only set the timestamp and stream id.
-    // @see https://github.com/ossrs/srs/issues/251
     //SrsSharedMessageHeader header;
     // Four-byte field that contains a timestamp of the message.
     // The 4 bytes are packed in the big-endian order.
@@ -278,7 +277,6 @@ private:
     {
     public:
         // The shared message header.
-        // @see https://github.com/ossrs/srs/issues/251
         SrsSharedMessageHeader header;
         // The actual shared payload.
         char* payload;