diff --git a/did-sdk/src/main/java/io/github/ehlxr/did/client/AbstractClient.java b/did-sdk/src/main/java/io/github/ehlxr/did/client/AbstractClient.java
index f9d77ed..341c1c4 100644
--- a/did-sdk/src/main/java/io/github/ehlxr/did/client/AbstractClient.java
+++ b/did-sdk/src/main/java/io/github/ehlxr/did/client/AbstractClient.java
@@ -138,7 +138,8 @@ public abstract class AbstractClient implements Client {
 
                 Try.of(() -> {
                     logger.debug("write {} to channel", sdkProto);
-                    channelFuture.channel().writeAndFlush(Message.newBuilder().type((byte) 0xA).flag((byte) 0xC).content(sdkProto).build())
+                    channelFuture.channel()
+                            .writeAndFlush(Message.newBuilder().type((byte) 0xA).flag((byte) 0xC).content(sdkProto).build())
                             .addListener(channelFuture -> {
                                 if (channelFuture.isSuccess()) {
                                     return;
diff --git a/did-sdk/src/test/java/io/github/ehlxr/did/DidSdkPressTest.java b/did-sdk/src/test/java/io/github/ehlxr/did/DidSdkPressTest.java
index 9a0c0f6..5ac4e04 100644
--- a/did-sdk/src/test/java/io/github/ehlxr/did/DidSdkPressTest.java
+++ b/did-sdk/src/test/java/io/github/ehlxr/did/DidSdkPressTest.java
@@ -1,6 +1,7 @@
 package io.github.ehlxr.did;
 
 import io.github.ehlxr.did.client.SdkClient;
+import io.github.ehlxr.did.common.Try;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -8,6 +9,8 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.stream.IntStream;
 
 /**
  * 压测
@@ -30,63 +33,59 @@ public class DidSdkPressTest {
     }
 
     @Test
-    public void asyncTest() throws Exception {
-        long start;
-        long end;
-        long cast;
-        long amount = 0;
-        long allcast = 0;
+    public void syncTest() {
+        int nums = 6000;
+        int round = 10;
 
-        for (int k = 0; k < 10; k++) {
-            // 初始发送总量
-            int NUM = 80000;
-            final CountDownLatch countDownLatch = new CountDownLatch(NUM);
-            start = System.currentTimeMillis();
-            for (int i = 0; i < NUM; i++) {
-                client.invokeAsync(responseFuture -> countDownLatch.countDown());
-            }
+        AtomicLong amount = new AtomicLong();
+        AtomicLong allcast = new AtomicLong();
 
-            // countDownLatch.await(10, TimeUnit.SECONDS);
-            countDownLatch.await();
-            end = System.currentTimeMillis();
-            cast = (end - start);
-            allcast += cast;
+        IntStream.range(0, round).forEach(j -> {
+            long start = System.currentTimeMillis();
+            IntStream.range(0, nums).parallel().forEach(i -> client.invokeSync());
 
-            logger.info("invokeAsync test num is: {}, cast time: {} millsec, throughput: {} send/millsec", NUM, cast, (double) NUM / cast);
-            amount += NUM;
-            // NUM = NUM + 5000;
-            // TimeUnit.SECONDS.sleep(2);
-        }
+            long end = System.currentTimeMillis();
+            long cast = (end - start);
+            allcast.addAndGet(cast);
 
-        logger.info("invokeAsync test all num is: {}, all cast time: {} millsec, all throughput: {} send/millsec", amount, allcast, (double) amount / allcast);
+            logger.info("invokeSync test num is: {}, cast time: {} millsec, throughput: {} send/millsec",
+                    nums, cast, (long) nums / cast);
+            amount.addAndGet(nums);
+        });
+
+        logger.info("invokeSync test all num is: {}, all cast time: {} millsec, all throughput: {} send/millsec",
+                amount, allcast, amount.get() / allcast.get());
     }
 
     @Test
-    public void syncTest() {
-        long start;
-        long end;
-        long cast;
-        long amount = 0;
-        long allcast = 0;
+    public void asyncTest() {
+        int nums = 6000;
+        int round = 10;
 
-        for (int k = 0; k < 10; k++) {
-            start = System.currentTimeMillis();
-            int NUM = 60000;
-            for (int i = 0; i < NUM; i++) {
-                client.invokeSync();
-            }
+        AtomicLong amount = new AtomicLong();
+        AtomicLong allcast = new AtomicLong();
 
-            end = System.currentTimeMillis();
-            cast = (end - start);
-            allcast += cast;
+        IntStream.range(0, round).forEach(j -> {
+            long start = System.currentTimeMillis();
 
-            logger.info("invokeSync test num is: {}, cast time: {} millsec, throughput: {} send/millsec", NUM, cast, (double) NUM / cast);
+            final CountDownLatch countDownLatch = new CountDownLatch(nums);
+            IntStream.range(0, nums).parallel().forEach(i ->
+                    Try.of(() ->
+                            client.invokeAsync(rf -> countDownLatch.countDown())
+                    ).trap(Throwable::printStackTrace).run()
+            );
+            Try.of((Try.ThrowableRunnable) countDownLatch::await).trap(Throwable::printStackTrace).run();
 
-            amount += NUM;
-            // NUM += 5000;
-            // TimeUnit.SECONDS.sleep(2);
-        }
+            long end = System.currentTimeMillis();
+            long cast = (end - start);
+            allcast.addAndGet(cast);
 
-        logger.info("invokeSync test all num is: {}, all cast time: {} millsec, all throughput: {} send/millsec", amount, allcast, (double) amount / allcast);
+            logger.info("invokeAsync test num is: {}, cast time: {} millsec, throughput: {} send/millsec",
+                    nums, cast, (long) nums / cast);
+            amount.addAndGet(nums);
+        });
+
+        logger.info("invokeAsync test all num is: {}, all cast time: {} millsec, all throughput: {} send/millsec",
+                amount, allcast, amount.get() / allcast.get());
     }
 }
diff --git a/did-sdk/src/test/resources/logback.xml b/did-sdk/src/test/resources/logback.xml
new file mode 100644
index 0000000..38eaada
--- /dev/null
+++ b/did-sdk/src/test/resources/logback.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%date [%thread] %-5level %logger{35}:%line - %msg%n</pattern>
+            <charset>UTF-8</charset>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT"/>
+    </root>
+
+    <logger name="io.netty" level="OFF"/>
+
+</configuration>
\ No newline at end of file
diff --git a/did-server/pom.xml b/did-server/pom.xml
index 112daee..45ad202 100644
--- a/did-server/pom.xml
+++ b/did-server/pom.xml
@@ -18,6 +18,12 @@
             <groupId>io.github.ehlxr</groupId>
             <artifactId>did-core</artifactId>
         </dependency>
+
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/did-server/src/test/java/io/github/ehlxr/did/SnowFlakeTest.java b/did-server/src/test/java/io/github/ehlxr/did/SnowFlakeTest.java
new file mode 100644
index 0000000..bf6efa8
--- /dev/null
+++ b/did-server/src/test/java/io/github/ehlxr/did/SnowFlakeTest.java
@@ -0,0 +1,95 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright © 2020 xrv <xrg@live.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package io.github.ehlxr.did;
+
+import io.github.ehlxr.did.common.Try;
+import io.github.ehlxr.did.generator.SnowFlake;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.Set;
+import java.util.concurrent.CopyOnWriteArraySet;
+import java.util.concurrent.CyclicBarrier;
+import java.util.concurrent.ForkJoinPool;
+import java.util.stream.IntStream;
+
+/**
+ * @author ehlxr
+ * @since 2021-02-10 09:37.
+ */
+public class SnowFlakeTest {
+    SnowFlake snowFlake;
+
+    @Before
+    public void init() {
+        snowFlake = SnowFlake.newBuilder().datacenterId(1).machineId(1).build();
+    }
+
+    @Test
+    public void parallelTest() {
+        Set<Long> ids = new CopyOnWriteArraySet<>();
+
+        // 总数
+        int counts = 40000;
+
+        // 并发数
+        int threads = 100;
+        CyclicBarrier cyclicBarrier = new CyclicBarrier(threads);
+
+        // ExecutorService pool = Executors.newFixedThreadPool(threads);
+        ForkJoinPool pool = new ForkJoinPool(threads);
+        long now = System.currentTimeMillis();
+
+        IntStream.range(0, counts).forEach(i ->
+                pool.execute(() -> {
+                    // 等待 threads 个任务准备就绪
+                    Try.of((Try.ThrowableRunnable) cyclicBarrier::await).trap(System.out::println).run();
+
+                    long id = snowFlake.nextId();
+                    if (!ids.add(id)) {
+                        System.out.println(id);
+                    }
+                }));
+
+        pool.shutdown();
+        while (!pool.isTerminated()) {
+            Try.of(() -> Thread.sleep(10)).trap(System.out::println).run();
+        }
+        long end = System.currentTimeMillis();
+        System.out.println(ids.size() + " ids create at " + (end - now) + "ms.");
+    }
+
+    @Test
+    public void qpsTest() {
+        int nums = 10000;
+
+        IntStream.range(0, 10).forEach(j -> {
+            long start = System.currentTimeMillis();
+            IntStream.range(0, nums).parallel().forEach(i -> snowFlake.nextId());
+
+            System.out.println("over: qps= " + ((long) nums * 1000 / (System.currentTimeMillis() - start)));
+        });
+    }
+}