1.修改新的traceid生成算法，能够比UUID在200并发情况下，速度提高30倍。

skywalking-api/src/main/java/com/ai/cloud/skywalking/util/TraceIdGenerator.java

@@ -1,13 +1,34 @@
 package com.ai.cloud.skywalking.util;
 
+import java.util.HashMap;
+import java.util.Random;
 import java.util.UUID;
 
 public final class TraceIdGenerator {
+	private static final ThreadLocal<Integer> ThreadTraceIdSequence = new ThreadLocal<Integer>();
+	
+	private static final String PROCESS_UUID;
+	
+	static{
+		String uuid = UUID.randomUUID().toString().replaceAll("-", "");
+		PROCESS_UUID = uuid.substring(uuid.length() - 7);
+	}
+	
     private TraceIdGenerator() {
-        // Non
     }
-
-    public static String generate() {
-        return UUID.randomUUID().toString().replaceAll("-", "");
+    
+    public static String generate(){
+    	Integer seq = ThreadTraceIdSequence.get();
+    	if(seq == null || seq == 10000 || seq > 10000){
+    		seq = 0;
+    	}
+    	seq++;
+    	ThreadTraceIdSequence.set(seq);
+    	
+    	return System.currentTimeMillis()
+                + "." + PROCESS_UUID
+                + "." + BuriedPointMachineUtil.getProcessNo()
+                + "." + Thread.currentThread().getId() 
+                + "." + seq;
     }
 }