com.google.javascript.jscomp.parsing.parser.util.Timer Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of closure-compiler Show documentation
Show all versions of closure-compiler Show documentation
Closure Compiler is a JavaScript optimizing compiler. It parses your
JavaScript, analyzes it, removes dead code and rewrites and minimizes
what's left. It also checks syntax, variable references, and types, and
warns about common JavaScript pitfalls. It is used in many of Google's
JavaScript apps, including Gmail, Google Web Search, Google Maps, and
Google Docs.
/*
* Copyright 2011 The Closure Compiler Authors.
*
* 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 com.google.javascript.jscomp.parsing.parser.util;
import com.google.javascript.jscomp.parsing.parser.util.format.SimpleFormat;
import java.io.PrintStream;
import java.util.HashMap;
// TODO: stack timers to get inclusive/exclusive times
public class Timer {
private final String name;
private final long start;
public Timer(String name) {
this.name = name;
this.start = getCurrentTime();
}
public void end() {
logTime(this.name, getCurrentTime() - this.start);
}
private static long getCurrentTime() {
return System.currentTimeMillis();
}
public static class Entry {
public final String name;
public int count;
public long elapsedTime;
public Entry(String name) {
this.name = name;
}
}
private static final HashMap entries = new HashMap<>();
public static void logTime(String name, long elapsedTime) {
Entry entry = getEntry(name);
entry.count++;
entry.elapsedTime += elapsedTime;
}
private static Entry getEntry(String name) {
Entry entry;
if (!entries.containsKey(name)) {
entry = new Entry(name);
entries.put(name, entry);
} else {
entry = entries.get(name);
}
return entry;
}
public static Iterable getEntries() {
return entries.values();
}
public static void clearEntries() {
entries.clear();
}
public static void dumpEntries(PrintStream out) {
for (Entry entry : getEntries()) {
out.println(SimpleFormat.format(
"Time '%s'(%d): %fms",
entry.name, entry.count, entry.elapsedTime / 1000.0));
}
clearEntries();
}
}