chrisvest

import org.junit.Rule;
import org.junit.Test;

import org.neo4j.graphdb.DependencyResolver;
import org.neo4j.graphdb.RelationshipType;
import org.neo4j.graphdb.factory.GraphDatabaseFactory;
import org.neo4j.kernel.GraphDatabaseAPI;
import org.neo4j.kernel.impl.nioneo.store.NeoStore;
import org.neo4j.kernel.impl.nioneo.store.NodeRecord;
import org.neo4j.kernel.impl.nioneo.store.NodeStore;

chrisvest

shipilev:stormpot-benchmark[master*]$ uname -a
Darwin shipilev.local 13.0.2 Darwin Kernel Version 13.0.2: Sun Sep 29 19:38:57 PDT 2013; root:xnu-2422.75.4~1/RELEASE_X86_64 x86_64
shipilev:stormpot-benchmark[master*]$ java -version
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)
shipilev:stormpot-benchmark[master*]$ 

[ 1 thread ]
shipilev:stormpot-benchmark[master*]$ java -jar target/object-pool-benchmarks.jar ".*ClaimRelease.*" -t 1 -i 6 -wi 6 -f 1 -tu s -bm thrpt

chrisvest

import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

import org.junit.Rule;
import org.junit.Test;

chrisvest

shipilev:object-pool-benchmarks[stormpot-2.2]$ ### Conditional CAS and lazySet:
shipilev:object-pool-benchmarks[stormpot-2.2]$ java -jar target/object-pool-benchmarks.jar ".*ClaimRelease.StormpotBlaze.*" -t 8 -tu ms -bm thrpt
# Run progress: 0.00% complete, ETA 00:06:40
# VM invoker: /Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Contents/Home/jre/bin/java
# VM options: <none>
# Fork: 1 of 10
# Warmup: 20 iterations, 1 s each
# Measurement: 20 iterations, 1 s each
# Threads: 8 threads, will synchronize iterations
# Benchmark mode: Throughput, ops/time

chrisvest

mvn clean package && java -jar target/object-pool-benchmarks.jar ".*ClaimRelease.StormpotBlaze.*" -t 8 -tu ms -bm thrpt -f 3

branch:
Benchmark                                    Mode   Samples         Mean   Mean error    Units

master:
o.s.ClaimRelease.StormpotBlazePool.cycle    thrpt        60   255582.217     2739.712   ops/ms

perf/extend-atomicint:

chrisvest

import java.util.concurrent.SynchronousQueue;

import org.openjdk.jmh.annotations.GenerateMicroBenchmark;
import org.openjdk.jmh.annotations.Group;
import org.openjdk.jmh.annotations.GroupThreads;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.logic.Control;

chrisvest

var Functor = ['map'];
var Applicative = ['maps', 'wrap'].concat(Functor);
var Monad = ['mapcat'].concat(Applicative);

var compliment = function (f) {
	return function (x) {
		return !f(x);
	}
}

chrisvest

public static void main(String[] args) {
  outer:for (int i = Integer.MIN_VALUE; i < Integer.MAX_VALUE; i++) {
    // Optimise the program by checking most likely candidates for
    // coercion conflicts first.
    boolean foundConflict = false;
    for (int x = 1; x < 100; x++) {
      // scala> for (x <- 1 until 15)
      //            yield ((x / 2) ^ (-1 * (x % 2)));
      // res21: Seq[Int] =
      //   Vector(-1, 1, -2, 2, -3, 3, -4, 4, -5, 5, -6, 6, -7, 7)

chrisvest

chris@Minty ~ $ perf stat -d echo 1
1

 Performance counter stats for 'echo 1':

          0.597512 task-clock                #    0.249 CPUs utilized          
                 3 context-switches          #    0.005 M/sec                  
                 0 cpu-migrations            #    0.000 K/sec                  
               176 page-faults               #    0.295 M/sec                  
   <not supported> cycles                  

chrisvest

import org.openjdk.jmh.annotations.Benchmark;

public class Finalizer
{
    private static class ObjectWithFinalizer
    {
        @Override
        protected void finalize() throws Throwable
        {
            super.finalize();