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-rw-r--r--infrastructure/net.appjet.ajstdlib/timer.scala85
1 files changed, 85 insertions, 0 deletions
diff --git a/infrastructure/net.appjet.ajstdlib/timer.scala b/infrastructure/net.appjet.ajstdlib/timer.scala
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+++ b/infrastructure/net.appjet.ajstdlib/timer.scala
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+/**
+ * Copyright 2009 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS-IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.appjet.ajstdlib;
+
+import scala.collection.mutable.{HashMap,ListBuffer};
+import java.util.concurrent.locks.ReentrantLock;
+
+object timer {
+
+ var _timings = new HashMap[String,ListBuffer[double]];
+ var _lock = new ReentrantLock;
+ var _callstack = new ThreadLocal[ListBuffer[String]];
+
+ def start(opname: String) = {
+ var _localcallstack = _callstack.get();
+ if (_localcallstack == null) {
+ _callstack.set(new ListBuffer[String]);
+ _localcallstack = _callstack.get();
+ }
+ _localcallstack += opname;
+ var _oplabel = _localcallstack.mkString(".");
+ val startTime: long = System.nanoTime();
+
+ new {
+ def done() {
+ val elapsedTimeMs: double = (System.nanoTime() - startTime) / 1.0e6;
+
+ _lock.lock();
+ try {
+ var times = _timings.getOrElse(_oplabel, new ListBuffer[double]);
+ /*
+ if (times.size > 100000) {
+ times = new ListBuffer[double];
+ }*/
+ times += elapsedTimeMs;
+ _timings.put(_oplabel, times);
+ _localcallstack.remove(_localcallstack.length-1);
+ } finally {
+ _lock.unlock();
+ }
+ }
+ }
+ }
+
+ def getOpNames(): Array[String] = {
+ _lock.lock();
+ try {
+ return _timings.keys.toList.toArray;
+ } finally {
+ _lock.unlock();
+ }
+ }
+
+ def getStats(opname: String): Array[double] = {
+ _lock.lock();
+
+ try {
+ var times:ListBuffer[double] = _timings(opname);
+ var total = times.foldRight(0.0)(_ + _);
+ return Array(times.size, total, (total / times.size));
+ } finally {
+ _lock.unlock();
+ }
+ }
+
+ def reset() {
+ _lock.lock();
+ _timings = new HashMap[String,ListBuffer[double]];
+ _lock.unlock();
+ }
+}