diff --git a/trunk/src/app/srs_app_http_api.cpp b/trunk/src/app/srs_app_http_api.cpp
index a0c43492e..a9e775db5 100644
--- a/trunk/src/app/srs_app_http_api.cpp
+++ b/trunk/src/app/srs_app_http_api.cpp
@@ -525,8 +525,8 @@ int SrsApiVhosts::do_process_request(SrsStSocket* skt, SrsHttpMessage* req)
     std::stringstream ss;
     
     std::set<std::string> vhost_set;
-    SrsStreamInfoMap* pool = SrsStatistic::instance()->get_pool();
-    SrsStreamInfoMap::iterator it;
+    std::map<void*, SrsStreamInfo*>* pool = SrsStatistic::instance()->get_pool();
+    std::map<void*, SrsStreamInfo*>::iterator it;
     for (it = pool->begin(); it != pool->end(); it++) {
         if (it->second->_req == NULL)
             continue;
@@ -572,8 +572,8 @@ int SrsApiStreams::do_process_request(SrsStSocket* skt, SrsHttpMessage* req)
     if (query_name.size() > 0 || query_vhost.size() > 0) {
         ss << __SRS_JARRAY_START;
         bool first = true;
-        SrsStreamInfoMap* pool = SrsStatistic::instance()->get_pool();
-        SrsStreamInfoMap::iterator it;
+        std::map<void*, SrsStreamInfo*>* pool = SrsStatistic::instance()->get_pool();
+        std::map<void*, SrsStreamInfo*>::iterator it;
         for (it = pool->begin(); it != pool->end(); it++) {
             SrsRequest* reqinfo = it->second->_req;
             if (reqinfo == NULL)
diff --git a/trunk/src/app/srs_app_statistic.cpp b/trunk/src/app/srs_app_statistic.cpp
index fea7a9635..331672adb 100644
--- a/trunk/src/app/srs_app_statistic.cpp
+++ b/trunk/src/app/srs_app_statistic.cpp
@@ -32,44 +32,54 @@ SrsStreamInfo::SrsStreamInfo()
 
 SrsStreamInfo::~SrsStreamInfo()
 {
-    if (_req != NULL)
-        delete _req;
+    srs_freep(_req);
 }
 
-SrsStatistic *SrsStatistic::_instance = NULL;
+SrsStatistic* SrsStatistic::_instance = NULL;
 
 SrsStatistic::SrsStatistic()
 {
-
 }
 
 SrsStatistic::~SrsStatistic()
 {
-    SrsStreamInfoMap::iterator it;
+    std::map<void*, SrsStreamInfo*>::iterator it;
     for (it = pool.begin(); it != pool.end(); it++) {
-        delete it->second;
+        SrsStreamInfo* si = it->second;
+        srs_freep(si);
     }
 }
 
-SrsStreamInfoMap* SrsStatistic::get_pool()
+SrsStatistic* SrsStatistic::instance()
+{
+    if (_instance == NULL) {
+        _instance = new SrsStatistic();
+    }
+    return _instance;
+}
+
+std::map<void*, SrsStreamInfo*>* SrsStatistic::get_pool()
 {
     return &pool;
 }
 
 SrsStreamInfo* SrsStatistic::get(void *p)
 {
-    SrsStreamInfoMap::iterator it = pool.find(p);
+    std::map<void*, SrsStreamInfo*>::iterator it = pool.find(p);
     if (it == pool.end()) {
-        pool[p] = new SrsStreamInfo();
-        return pool[p];
+        SrsStreamInfo* si = new SrsStreamInfo();
+        pool[p] = si;
+        return si;
     } else {
-        return it->second;
+        SrsStreamInfo* si = it->second;
+        return si;
     }
 }
 
 void SrsStatistic::add_request_info(void *p, SrsRequest *req)
 {
-    SrsStreamInfo *info = get(p);
-    if (info->_req == NULL)
+    SrsStreamInfo* info = get(p);
+    if (info->_req == NULL) {
         info->_req = req->copy();
+    }
 }
\ No newline at end of file
diff --git a/trunk/src/app/srs_app_statistic.hpp b/trunk/src/app/srs_app_statistic.hpp
index 132b78ff4..41cbbeace 100644
--- a/trunk/src/app/srs_app_statistic.hpp
+++ b/trunk/src/app/srs_app_statistic.hpp
@@ -39,32 +39,24 @@ class SrsStreamInfo
 public:
     SrsStreamInfo();
     virtual ~SrsStreamInfo();
-
+public:
     SrsRequest *_req;
 };
 
-typedef std::map<void*, SrsStreamInfo*> SrsStreamInfoMap;
-
 class SrsStatistic
 {
 public:
-    static SrsStatistic *instance()
-    {
-        if (_instance == NULL) {
-            _instance = new SrsStatistic();
-        }
-        return _instance;
-    }
-
-    virtual SrsStreamInfoMap* get_pool();
-
+    static SrsStatistic* instance();
+public:
+    virtual std::map<void*, SrsStreamInfo*>* get_pool();
     virtual void add_request_info(void *p, SrsRequest *req);
-    
 private:
     SrsStatistic();
     virtual ~SrsStatistic();
+private:
     static SrsStatistic *_instance;
-    SrsStreamInfoMap pool;
+    std::map<void*, SrsStreamInfo*> pool;
+private:
     virtual SrsStreamInfo *get(void *p);
 };