diff --git a/Nlbench.sh b/Nlbench.sh
index 46c4e7e..8494cf9 100644
--- a/Nlbench.sh
+++ b/Nlbench.sh
@@ -84,49 +84,37 @@ detect_region() {
     esac
 }
 
-# iperf3测试函数
 run_iperf3_test() {
-    local servers=(
-        # Europe
-        "ping.online.net"
-        "ping6.online.net"
-        "ping-90ms.online.net"
-        "ping6-90ms.online.net"
-        "iperf3.moji.fr"
-        "iperf.par2.as49434.net"
-        "paris.testdebit.info"
-        "lille.testdebit.info"
-        "lyon.testdebit.info"
-        "aix-marseille.testdebit.info"
-        "bordeaux.testdebit.info"
-        "nl.iperf.014.fr"
-        "ch.iperf.014.fr"
-        "iperf.eenet.ee"
-        "iperf.astra.in.ua"
-        "iperf.volia.net"
-        
-        # Asia
-        "speedtest.uztelecom.uz"
-        "iperf.it-north.net"
-        "iperf.biznetnetworks.com"
-        
-        # Oceania
-        "speedtest-iperf-akl.vetta.online"
-        
-        # Americas
-        "iperf.scottlinux.com"
-        "iperf.he.net"
+    declare -A regions=(
+        ["Europe"]="ping.online.net ping6.online.net iperf3.moji.fr iperf.par2.as49434.net paris.testdebit.info iperf.eenet.ee iperf.volia.net"
+        ["Asia"]="speedtest.uztelecom.uz iperf.it-north.net iperf.biznetnetworks.com"
+        ["Oceania"]="speedtest-iperf-akl.vetta.online"
+        ["Americas"]="iperf.scottlinux.com iperf.he.net"
     )
 
-    for server in "${servers[@]}"; do
-        echo "测试服务器: $server"
-        if timeout 15 iperf3 -c "$server" -t 30 -P 3 2>/dev/null; then
-            echo "测试完成"
-        else
-            echo "测试失败或超时"
-        fi
-        echo "----------------------------------------"
+    echo "开始iperf3测试..."
+
+    for region in "${!regions[@]}"; do
+        echo "测试 $region 地区..."
+        servers=(${regions[$region]})
+        for server in "${servers[@]}"; do
+            echo "  检查服务器: $server"
+            if timeout 5 iperf3 -c "$server" -t 1 -P 1 >/dev/null 2>&1; then
+                echo "  服务器可用，开始测试..."
+                if timeout 15 iperf3 -c "$server" -t 10 -P 3; then
+                    echo "  测试完成"
+                else
+                    echo "  测试失败或超时"
+                fi
+                echo "----------------------------------------"
+                break  # 找到可用服务器后，跳出当前地区的循环
+            else
+                echo "  服务器忙或不可用，尝试下一个"
+            fi
+        done
     done
+
+    echo "iperf3测试完成"
 }
 
 # 统计使用次数