shipilev

SLOC	Directory	SLOC-by-Language (Sorted)
13427   jmh-core        java=12043,xml=1384
10436   jmh-core-it     java=10254,xml=182
3088    jmh-core-ct     java=2996,xml=92
1691    jmh-samples     java=1589,xml=102
1006    jmh-core-benchmarks java=887,xml=119
745     jmh-archetypes  xml=738,java=7
671     jmh-generator-bytecode java=567,xml=104
468     jmh-generator-annprocess java=397,xml=71
409     jmh-generator-reflection java=337,xml=72

shipilev

$ bin/java -jar ~/projects/jol/jol-cli/target/jol-internals.jar java.lang.String
Running 64-bit HotSpot VM.
Using compressed references with 3-bit shift.
Objects are 8 bytes aligned.
Field sizes by type: 4, 1, 1, 2, 2, 4, 4, 8, 8 [bytes]
Array element sizes: 4, 1, 1, 2, 2, 4, 4, 8, 8 [bytes]

java.lang.String object internals:
 OFFSET  SIZE    TYPE DESCRIPTION                    VALUE
      0     4         (object header)                01 00 00 00 (0000 0001 0000 0000 0000 0000 0000 0000)

shipilev

$ acpitool -B
  Battery #1     : present
    Remaining capacity : 70810 mWh, 98.95%, 06:39:02
    Design capacity    : 82620 mWh
    Last full capacity : 71560 mWh, 86.61% of design capacity
    Capacity loss      : 13.39%
    Present rate       : 10647 mW
    Charging state     : Discharging
    Battery type       : Li-ion 
    Model number       : 42T4710

shipilev

Benchmark code:
 https://github.com/shipilev/article-exception-benchmarks

Prepare:
 $ mvn clean install

Run:
 $ java -jar target/microbenchmarks.jar ".*ThrowingStackless.*" -f 1 -wi 5 -i 5 -t ${THREADS}

On 2x12x2 Xeon, JDK 8 GA x86_64:

shipilev

### Keybase proof

I hereby claim:

  * I am shipilev on github.
  * I am shipilev (https://keybase.io/shipilev) on keybase.
  * I have a public key whose fingerprint is 0190 82BC 00E0 324E 2AEF  4CF0 0D3B 3285 62A1 19A7

To claim this, I am signing this object:

shipilev

$ wget -6 keys.gnupg.net
--2014-07-30 16:27:36--  http://keys.gnupg.net/
Resolving keys.gnupg.net (keys.gnupg.net)... 2001:41d0:8:44d7::1:1, 2001:610:1108:5011::70, 2001:6f8:1c3c:babe::62:1, ...
Connecting to keys.gnupg.net (keys.gnupg.net)|2001:41d0:8:44d7::1:1|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: http://www.adeti.org/ [following]
--2014-07-30 16:27:36--  http://www.adeti.org/
Resolving www.adeti.org (www.adeti.org)... 2001:41d0:8:44d7::1:1, 91.121.41.109

$ wget -4 keys.gnupg.net

shipilev

/***** BEGIN LICENSE BLOCK *****
 * Version: CPL 1.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Common Public
 * License Version 1.0 (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.eclipse.org/legal/cpl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or

shipilev

This is a class:

class C {
  final int v; 
  C(int v) {
    this.v = v;
  }

  int sqr() { 
    return v*v;

shipilev

@BenchmarkMode(Mode.AverageTime)
@Warmup(iterations = 5)
@Measurement(iterations = 5)
@Fork(3)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Benchmark)
public class MyBenchmark {

    private static class TestActor extends UntypedActor {
        @Override

shipilev

package org.openjdk;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLongFieldUpdater;

import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.infra.Blackhole;

/**
 * <code>