diff --git a/src/common/thread/test/ThreadTest.cpp b/src/common/thread/test/ThreadTest.cpp
index ae3cc65f871..02564cf477e 100644
--- a/src/common/thread/test/ThreadTest.cpp
+++ b/src/common/thread/test/ThreadTest.cpp
@@ -3,11 +3,11 @@
  * This source code is licensed under Apache 2.0 License,
  * attached with Common Clause Condition 1.0, found in the LICENSES directory.
  */
-
+#include "iostream"
 #include "base/Base.h"
 #include <gtest/gtest.h>
 #include "thread/NamedThread.h"
-
+#include "vector"
 namespace nebula {
 namespace thread {
 
@@ -25,6 +25,18 @@ TEST(NamedThread, ThreadName) {
 TEST(NamedThread, ThreadID) {
     ASSERT_EQ(::getpid(), nebula::thread::gettid());
 }
+TEST(NameThread, test) {
+   static int j = 0;
+   std::vector <std::thread>t;
+   for (int i = 0; i < 10; i++) {
+     std::thread mythread(j++);
+     t.push_back(std::move(mythread));
+   }
 
+   for (int i = 0; i < 10 ; i++) {
+   t[i].join();
+}
+     ASSERT_GE(j, 10);
+}
 }   // namespace thread
 }   // namespace nebula
diff --git a/src/common/time/test/.DurationTest.cpp.swl b/src/common/time/test/.DurationTest.cpp.swl
new file mode 100644
index 00000000000..93821fab8a5
Binary files /dev/null and b/src/common/time/test/.DurationTest.cpp.swl differ
diff --git a/src/common/time/test/.DurationTest.cpp.swm b/src/common/time/test/.DurationTest.cpp.swm
new file mode 100644
index 00000000000..47456164d19
Binary files /dev/null and b/src/common/time/test/.DurationTest.cpp.swm differ
diff --git a/src/common/time/test/.DurationTest.cpp.swn b/src/common/time/test/.DurationTest.cpp.swn
new file mode 100644
index 00000000000..92aa1fe6a6a
Binary files /dev/null and b/src/common/time/test/.DurationTest.cpp.swn differ
diff --git a/src/common/time/test/.DurationTest.cpp.swo b/src/common/time/test/.DurationTest.cpp.swo
new file mode 100644
index 00000000000..368f96c6b4b
Binary files /dev/null and b/src/common/time/test/.DurationTest.cpp.swo differ
diff --git a/src/common/time/test/.exrc b/src/common/time/test/.exrc
new file mode 100644
index 00000000000..e4200768bd3
--- /dev/null
+++ b/src/common/time/test/.exrc
@@ -0,0 +1,18 @@
+if &cp | set nocp | endif
+let s:cpo_save=&cpo
+set cpo&vim
+vmap gx <Plug>NetrwBrowseXVis
+nmap gx <Plug>NetrwBrowseX
+vnoremap <silent> <Plug>NetrwBrowseXVis :call netrw#BrowseXVis()
+nnoremap <silent> <Plug>NetrwBrowseX :call netrw#BrowseX(expand((exists("g:netrw_gx")? g:netrw_gx : '<cfile>')),netrw#CheckIfRemote())
+let &cpo=s:cpo_save
+unlet s:cpo_save
+set ambiwidth=double
+set backspace=indent,eol,start
+set fileencodings=ucs-bom,utf-8,default,latin1
+set helplang=en
+set nomodeline
+set ruler
+set runtimepath=~/.vim,/var/lib/vim/addons,/usr/share/vim/vimfiles,/usr/share/vim/vim74,/usr/share/vim/vimfiles/after,/var/lib/vim/addons/after,~/.vim/after
+set suffixes=.bak,~,.swp,.o,.info,.aux,.log,.dvi,.bbl,.blg,.brf,.cb,.ind,.idx,.ilg,.inx,.out,.toc
+" vim: set ft=vim :
diff --git a/src/common/time/test/CMakeLists.txt b/src/common/time/test/CMakeLists.txt
index 1b73d25d3c8..a2d1d7c9182 100644
--- a/src/common/time/test/CMakeLists.txt
+++ b/src/common/time/test/CMakeLists.txt
@@ -11,6 +11,13 @@ nebula_add_test(
         gtest
 )
 
+
+
+
+
+
+
+
 nebula_add_test(
     NAME
         wallclock_test
@@ -26,6 +33,7 @@ nebula_add_test(
 nebula_add_executable(
     NAME
         duration_bm
+
     SOURCES
         DurationBenchmark.cpp
     OBJECTS
diff --git a/src/common/time/test/DurationTest.cpp b/src/common/time/test/DurationTest.cpp
index 1c7e2dd142e..1869d7b17d4 100644
--- a/src/common/time/test/DurationTest.cpp
+++ b/src/common/time/test/DurationTest.cpp
@@ -7,9 +7,12 @@
 #include "base/Base.h"
 #include <gtest/gtest.h>
 #include "time/Duration.h"
+#include "vector"
+#include "cmath"
+#include "time/WallClock.h"
 
 using nebula::time::Duration;
-
+using nebula::time::WallClock;
 TEST(Duration, elapsedInSeconds) {
     for (int i = 0; i < 5; i++) {
         Duration dur;
@@ -40,7 +43,31 @@ TEST(Duration, elapsedInMilliSeconds) {
                   dur.elapsedInMSec()) << "Inaccuracy in iteration " << i;
     }
 }
+TEST(WallClock , time ) {
+    std::vector<int64_t> time1;
+    std::vector<int64_t> time2;
+    for (uint32_t i = 0; i < 10; i++) {
+        auto sec1 = WallClock::fastNowInMicroSec();
+        usleep(3000);
+        auto sec2 = WallClock::fastNowInMicroSec();
+        auto cost_time = sec2-sec1;
+        time1.push_back(cost_time);
+    }
+    std::cout << time1[0] << std::endl;
+    int64_t sum = std::accumulate(time1.begin(), time1.end(), 0);
+    double average = sum*1.0/10;
+    std::cout << "Mean Error  : " << average-3000 << "ms " <<std::endl;
 
+    for (int i = 0; i < 10 ; i++) {
+        int64_t a = (time1[i]-average)*(time1[i]-average);
+        time2.push_back(a);
+    }
+    int64_t sum2 = std::accumulate(time2.begin(), time2.end(), 0);
+    double variance = sum2*1.0/9;
+    std::cout << "The  Variance  Is : "<< variance << std::endl;
+    double error = (abs(average-3000) * 1.0 / 3000) * 100;
+    std :: cout << "Test Error Is  : " << error  << "%" << std::endl;
+}
 
 int main(int argc, char** argv) {
     testing::InitGoogleTest(&argc, argv);
diff --git a/src/common/time/test/duration.cpp b/src/common/time/test/duration.cpp
new file mode 100644
index 00000000000..9fe09e04e5d
--- /dev/null
+++ b/src/common/time/test/duration.cpp
@@ -0,0 +1 @@
+// copyright <2018> djasioaw