diff --git a/include/ylt/metric/summary_impl.hpp b/include/ylt/metric/summary_impl.hpp
index ce853af64..081927a4d 100644
--- a/include/ylt/metric/summary_impl.hpp
+++ b/include/ylt/metric/summary_impl.hpp
@@ -10,6 +10,10 @@
 #include <type_traits>
 #include <vector>
 
+#ifdef SUMMARY_DEBUG_STABLE_TEST
+#include "ylt/easylog.hpp"
+#endif
+
 namespace ylt::metric::detail {
 
 template <typename uint_type, std::size_t frac_bit = 6>
@@ -331,13 +335,23 @@ class summary_impl {
       data_copy.inc();
     }
     return result;
-  }
+  };
+#ifdef SUMMARY_DEBUG_STABLE_TEST
+  static inline constexpr size_t ms_per_second = 1;
+#else
+  static inline constexpr size_t ms_per_second = 1000;
+#endif
 
   summary_impl(std::vector<double>& rate,
                std::chrono::seconds refresh_time = std::chrono::seconds{0})
       : rate_(rate),
-        refresh_time_(refresh_time.count() * 1000 / 2),
-        tp_(std::chrono::steady_clock::now().time_since_epoch().count()){};
+        refresh_time_(refresh_time.count() * ms_per_second / 2),
+        tp_(std::chrono::steady_clock::now().time_since_epoch().count()) {
+#ifdef SUMMARY_DEBUG_STABLE_TEST
+    ELOG_WARN << "summary max_age is ms now! dont use it in production! It's "
+                 "just for test";
+#endif
+  };
 
   ~summary_impl() {
     for (auto& data : data_) {
diff --git a/src/metric/benchmark/bench.hpp b/src/metric/benchmark/bench.hpp
index b464df58d..4306bc673 100644
--- a/src/metric/benchmark/bench.hpp
+++ b/src/metric/benchmark/bench.hpp
@@ -25,7 +25,7 @@ struct bench_clock_t {
   std::chrono::steady_clock::time_point start_;
 };
 
-template <typename IMPL, typename WRITE_OP>
+template <bool need_latch = true, typename IMPL, typename WRITE_OP>
 void bench_mixed_impl(IMPL& impl, WRITE_OP&& op, size_t thd_num,
                       std::chrono::seconds duration) {
   ylt::metric::summary_t lantency_summary(
@@ -41,40 +41,46 @@ void bench_mixed_impl(IMPL& impl, WRITE_OP&& op, size_t thd_num,
       auto dur = clock.duration<std::chrono::microseconds>();
       while (!stop && dur < duration + 1s) {
         op();
-        auto new_dur = clock.duration<std::chrono::microseconds>();
-        lantency_summary.observe((new_dur - dur).count() / 1000.0f);
-        dur = new_dur;
+        if constexpr (need_latch) {
+          auto new_dur = clock.duration<std::chrono::microseconds>();
+          lantency_summary.observe((new_dur - dur).count() / 1000.0f);
+          dur = new_dur;
+        }
       }
     }));
   }
   std::string s;
-
+  std::size_t tot = 0;
   bench_clock_t clock2;
   int64_t serialze_cnt = 0;
   do {
     s.clear();
     impl.serialize(s);
+    tot += s.size();
     ++serialze_cnt;
   } while (clock2.duration() < duration);
   auto total_ms = clock.duration();
   stop = true;
-  if constexpr (requires { impl.size(); }) {
-    std::cout << "size:" << impl.size() << "\n";
+  if constexpr (need_latch) {
+    if constexpr (requires { impl.size(); }) {
+      std::cout << "size:" << impl.size() << "\n";
+    }
+    std::cout << "serialize bytes total:" << tot << std::endl;
+    std::cout << "run " << total_ms.count() << "ms\n";
+    uint64_t cnt;
+    double sum;
+    auto result = lantency_summary.get_rates(sum, cnt);
+    auto seconds = total_ms.count() / 1000.0;
+    auto qps = 1.0 * cnt / seconds;
+    std::cout << "write thd num: " << thd_num << ", write qps: " << (int64_t)qps
+              << "\n";
+    std::cout << "serialize qps:" << 1000.0 * serialze_cnt / total_ms.count()
+              << ", str size=" << s.size() << "\n";
+    s = "";
+    lantency_summary.serialize(s);
+    std::cout << s;
   }
 
-  std::cout << "run " << total_ms.count() << "ms\n";
-  uint64_t cnt;
-  double sum;
-  auto result = lantency_summary.get_rates(sum, cnt);
-  auto seconds = total_ms.count() / 1000.0;
-  auto qps = 1.0 * cnt / seconds;
-  std::cout << "write thd num: " << thd_num << ", write qps: " << (int64_t)qps
-            << "\n";
-  std::cout << "serialize qps:" << 1000.0 * serialze_cnt / total_ms.count()
-            << ", str size=" << s.size() << "\n";
-  s = "";
-  lantency_summary.serialize(s);
-  std::cout << s;
   for (auto& thd : vec) {
     thd.join();
   }
@@ -227,7 +233,7 @@ inline void bench_dynamic_summary_serialize(size_t COUNT,
       COUNT, to_json);
 }
 
-template <typename IMPL, typename OP>
+template <bool need_output = true, typename IMPL, typename OP>
 void bench_write_impl(IMPL& impl, OP&& op, size_t thd_num,
                       std::chrono::seconds duration) {
   std::atomic<bool> stop = false;
@@ -247,13 +253,16 @@ void bench_write_impl(IMPL& impl, OP&& op, size_t thd_num,
   }
   std::this_thread::sleep_for(duration);
   stop = true;
-  std::cout << "run " << clock.duration().count() << "ms\n";
+  auto tm = clock.duration().count();
   double qps = 0;
   for (auto& thd : vec) {
     qps += thd.get();
   }
-  qps /= (clock.duration().count() / 1000.0);
-  std::cout << "thd num: " << thd_num << ", qps: " << (int64_t)qps << "\n";
+  if constexpr (need_output) {
+    std::cout << "run " << clock.duration().count() << "ms\n";
+    qps /= (clock.duration().count() / 1000.0);
+    std::cout << "thd num: " << thd_num << ", qps: " << (int64_t)qps << "\n";
+  }
 }
 
 inline void bench_static_counter_write(size_t thd_num,
diff --git a/src/metric/tests/CMakeLists.txt b/src/metric/tests/CMakeLists.txt
index 0c37b056f..704598187 100644
--- a/src/metric/tests/CMakeLists.txt
+++ b/src/metric/tests/CMakeLists.txt
@@ -2,6 +2,7 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/output/tests)
 add_executable(metric_test
         test_metric.cpp
         parallel_test.cpp
+        parallel_test2.cpp
         )
 check_asan(HAS_ASAN)
 if (has_asan) 
diff --git a/src/metric/tests/parallel_test2.cpp b/src/metric/tests/parallel_test2.cpp
new file mode 100644
index 000000000..165c99985
--- /dev/null
+++ b/src/metric/tests/parallel_test2.cpp
@@ -0,0 +1,50 @@
+
+#define SUMMARY_DEBUG_STABLE_TEST  // max_age=1ms
+#include <chrono>
+#include <thread>
+
+#include "../benchmark/bench.hpp"
+#include "doctest.h"
+#include "ylt/metric.hpp"
+
+TEST_CASE("test high press stable r/w with 1ms") {
+  std::vector<std::thread> works;
+  for (int i = 0; i < std::thread::hardware_concurrency() * 10; i++) {
+    works.emplace_back(std::thread{[]() {
+      ylt::metric::summary_t summary("summary mixed test", "",
+                                     {0.5, 0.9, 0.95, 0.99, 0.995}, 1s);
+      bench_mixed_impl<false>(
+          summary,
+          [&]() {
+            summary.observe(get_random(100));
+          },
+          1, 10s);
+    }});
+  }
+  for (auto& e : works) {
+    e.join();
+  }
+}
+
+TEST_CASE("test high press stable r with 1ms") {
+  std::vector<std::thread> works;
+  for (int i = 0; i < std::thread::hardware_concurrency() * 10; i++) {
+    works.emplace_back(std::thread{[]() {
+      ylt::metric::summary_t summary("summary mixed test", "",
+                                     {0.5, 0.9, 0.95, 0.99, 0.995}, 1s);
+      bench_write_impl<false>(
+          summary,
+          [&]() {
+            summary.observe(get_random(100));
+          },
+          2, 10s);
+    }});
+  }
+  for (auto& e : works) {
+    e.join();
+  }
+}
+
+TEST_CASE("test high parallel perform test with 3ms") {
+  bench_static_summary_mixed(std::thread::hardware_concurrency() * 4, 3s);
+}
\ No newline at end of file