diff --git a/build.sh b/build.sh
index e93e4a3..f92fa90 100755
--- a/build.sh
+++ b/build.sh
@@ -1,8 +1,10 @@
 #!/bin/bash
 BIN=$(pwd)/build
 if [ "${1}" == "clean" ]; then
-    rm -rvf ${BIN}
+    rm -rvf "${BIN}"
 else
-    if [ ! -d ${BIN} ]; then mkdir ${BIN}; fi;
-    g++ main.cpp -o ${BIN}/gn -std=c++11 -lpthread
+    if [ ! -d "${BIN}" ]; then
+        mkdir "${BIN}"
+    fi
+    g++ main.cpp -o "${BIN}/gn" -std=c++11 -lpthread
 fi
diff --git a/main.cpp b/main.cpp
index 02ff1f2..fde5493 100755
--- a/main.cpp
+++ b/main.cpp
@@ -38,7 +38,7 @@ static void gettimeofday(struct timeval* tp, struct timezone* tzp)
     tp->tv_sec = (long)((ularge.QuadPart - epoch) / 10000000L);
     tp->tv_usec = (long)(system_time.wMilliseconds * 1000);
 }
-static void usleep(unsigned long usec)
+static void ussleep(unsigned long usec)
 {
     LARGE_INTEGER interval;
     interval.QuadPart = -long(10 * usec);
@@ -60,7 +60,7 @@ struct Runtime {
 
 namespace {
     const char* g_file = "test";
-    uint64_t g_total = 1048576;
+    uint64_t g_total = 0x100000;
     int g_bits = 32;
     bool g_decrease = 0;
     int g_endian = 0;
@@ -117,7 +117,7 @@ int main(int argc, char* argv[])
     std::thread task(
         [&]()->void {
             while (true) {
-                msleep(100);
+                msleep(10);
                 if (!g_runtime.kmg) {
                     continue;
                 }
@@ -365,7 +365,7 @@ void parse_args(int argc, char** argv)
 void msleep(unsigned long ms)
 {
 #if (defined _WIN32) && (!defined __GNUC__)
-    usleep(1000 * ms);
+    ussleep(ms * 1000);
 #else
     struct timespec ts = {
         .tv_sec = static_cast<long>(ms / 1000),