From 7f104d2c01d5655e65f9150e3f7a7a807284e7ac Mon Sep 17 00:00:00 2001
From: wenshao <szujobs@hotmail.com>
Date: Sun, 7 Oct 2012 21:01:32 +0800
Subject: [PATCH] opimized memory used

---
 .../druid/support/profile/ProfileStat.java    |  7 ++--
 .../druid/stat/WebSessionStatTest.java        | 34 +++++++++++++++++++
 .../druid/stat/WebURIStatMemoryTest.java      | 34 +++++++++++++++++++
 3 files changed, 73 insertions(+), 2 deletions(-)
 create mode 100644 src/test/java/com/alibaba/druid/stat/WebSessionStatTest.java
 create mode 100644 src/test/java/com/alibaba/druid/stat/WebURIStatMemoryTest.java

diff --git a/src/main/java/com/alibaba/druid/support/profile/ProfileStat.java b/src/main/java/com/alibaba/druid/support/profile/ProfileStat.java
index c9a3de9b49..fbec2743ae 100644
--- a/src/main/java/com/alibaba/druid/support/profile/ProfileStat.java
+++ b/src/main/java/com/alibaba/druid/support/profile/ProfileStat.java
@@ -6,7 +6,10 @@ import java.util.concurrent.ConcurrentHashMap;
 
 public class ProfileStat {
 
-    private ConcurrentHashMap<ProfileEntryKey, ProfileEntryStat> entries = new ConcurrentHashMap<ProfileEntryKey, ProfileEntryStat>();
+    private ConcurrentHashMap<ProfileEntryKey, ProfileEntryStat> entries = new ConcurrentHashMap<ProfileEntryKey, ProfileEntryStat>(
+                                                                                                                                    16,
+                                                                                                                                    0.75f,
+                                                                                                                                    1);
 
     public ConcurrentHashMap<ProfileEntryKey, ProfileEntryStat> getEntries() {
         return entries;
@@ -16,7 +19,7 @@ public class ProfileStat {
         if (requestStatsMap == null) {
             return;
         }
-        
+
         for (Map.Entry<ProfileEntryKey, ProfileEntryReqStat> entry : requestStatsMap.entrySet()) {
             ProfileEntryKey entryKey = entry.getKey();
             ProfileEntryReqStat reqEntryStat = entry.getValue();
diff --git a/src/test/java/com/alibaba/druid/stat/WebSessionStatTest.java b/src/test/java/com/alibaba/druid/stat/WebSessionStatTest.java
new file mode 100644
index 0000000000..98ab6249dd
--- /dev/null
+++ b/src/test/java/com/alibaba/druid/stat/WebSessionStatTest.java
@@ -0,0 +1,34 @@
+package com.alibaba.druid.stat;
+
+import java.lang.management.ManagementFactory;
+import java.text.NumberFormat;
+
+import junit.framework.TestCase;
+
+import com.alibaba.druid.support.http.stat.WebSessionStat;
+
+public class WebSessionStatTest extends TestCase {
+
+    public void test_0() throws Exception {
+        WebSessionStat item = new WebSessionStat("");
+        gc();
+        long memoryStart = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage().getUsed();
+
+        final int COUNT = 1024 * 1024;
+        WebSessionStat[] items = new WebSessionStat[COUNT];
+        for (int i = 0; i < COUNT; ++i) {
+            items[i] = new WebSessionStat("");
+            // items[i] = Histogram.makeHistogram(20);
+        }
+
+        long memoryEnd = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage().getUsed();
+
+        System.out.println("memory used : " + NumberFormat.getInstance().format(memoryEnd - memoryStart));
+    }
+
+    private void gc() {
+        for (int i = 0; i < 10; ++i) {
+            System.gc();
+        }
+    }
+}
diff --git a/src/test/java/com/alibaba/druid/stat/WebURIStatMemoryTest.java b/src/test/java/com/alibaba/druid/stat/WebURIStatMemoryTest.java
new file mode 100644
index 0000000000..9499f67c18
--- /dev/null
+++ b/src/test/java/com/alibaba/druid/stat/WebURIStatMemoryTest.java
@@ -0,0 +1,34 @@
+package com.alibaba.druid.stat;
+
+import java.lang.management.ManagementFactory;
+import java.text.NumberFormat;
+
+import junit.framework.TestCase;
+
+import com.alibaba.druid.support.http.stat.WebURIStat;
+
+public class WebURIStatMemoryTest extends TestCase {
+
+    public void test_0() throws Exception {
+        WebURIStat item = new WebURIStat("");
+        gc();
+        long memoryStart = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage().getUsed();
+
+        final int COUNT = 1024 * 1024;
+        WebURIStat[] items = new WebURIStat[COUNT];
+        for (int i = 0; i < COUNT; ++i) {
+            items[i] = new WebURIStat("");
+            // items[i] = Histogram.makeHistogram(20);
+        }
+
+        long memoryEnd = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage().getUsed();
+
+        System.out.println("memory used : " + NumberFormat.getInstance().format(memoryEnd - memoryStart));
+    }
+
+    private void gc() {
+        for (int i = 0; i < 10; ++i) {
+            System.gc();
+        }
+    }
+}