mattwarren

using System.Globalization;
using Irony.Parsing;

namespace Grammar
{
    [Language("LuceneGrammar", "1.0", "Lucene Grammar")]
    public class LuceneGrammar : Irony.Parsing.Grammar
    {
        public LuceneGrammar()
            : base(true) // true means case sensitive

mattwarren

using CSharp.Atomic;
using HdrHistogram.NET.Iteration;
using HdrHistogram.NET.Utilities;
using LongBuffer = HdrHistogram.NET.Utilities.WrappedBuffer<long>;

namespace HdrHistogram.NET
{
    public class HistogramAllInOneClass
    {
        internal static readonly AtomicLong constructionIdentityCount = new AtomicLong(0);

mattwarren

static void Main(string[] args)
{
    var items = new[] { 1, 2, 3, 4, 5 };
    var test = items.Where(i =>
        {
            Console.WriteLine("Where: " + i);
            return i > 3 ? true : false; // only keeps items > 3
        })
        .Select(i =>
        {

mattwarren

Everything I Ever Learned About JVM Performance Tuning @Twitter- by Attila Szegedi
http://www.infoq.com/presentations/JVM-Performance-Tuning-twitter (video & slides)
  
9 Fallacies of Java Performance - by Ben Evans
http://www.infoq.com/articles/9_Fallacies_Java_Performance (video & slides)
 
Visualizing Java GC - by Ben Evans
http://www.infoq.com/presentations/Visualizing-Java-GC (video & slides)
 
 

mattwarren

public static Dictionary<FieldInfo, int> FieldOffsetsInMemory(Type t)
{
	try
	{
		var fields = t.GetFields(BindingFlags.Public | BindingFlags.Instance | BindingFlags.NonPublic);

		var emit = Emit<Func<object, ulong[]>>.NewDynamicMethod("_GetOffsetsInMemory" + t.FullName);
		var retLoc = emit.DeclareLocal<ulong[]>("ret");

		emit.LoadConstant(fields.Length);	// ulong

mattwarren

;   70:             var watch = new Stopwatch();
000000b4  lea         rcx,[5D3BB7F0h] 
000000bb  call        000000005F642050 
000000c0  mov         r12,rax 
000000c3  mov         rcx,r12 
000000c6  call        000000005D254C50 
000000cb  movzx       eax,byte ptr [r12+18h]  ; The call to watch.Start() has been in-lined
000000d1  test        eax,eax 
000000d3  jne         00000000000000E5 
000000d5  call        000000005D264320 

mattwarren

;   91:             var watch = new Stopwatch();
000000a6  lea         rcx,[5D3EBA90h] 
000000ad  call        000000005F6722F0 
000000b2  mov         r12,rax 
000000b5  mov         rcx,r12 
000000b8  call        000000005D284EF0 
;   92:             watch.Start();
000000bd  mov         rcx,r12 
000000c0  call        000000005D284E60 
;   93:             for (int i = 0; i < iterations; i++)

mattwarren

;  127:             var watch = new Stopwatch();
000000ac  lea         rcx,[5D3EB860h] 
000000b3  call        000000005F6720C0 
000000b8  mov         rsi,rax 
000000bb  mov         rcx,rsi 
000000be  call        000000005D294530 
;   128:             watch.Start();
000000c3  mov         rcx,rsi 
000000c6  call        000000005D284C30 
;  129:             for (int i = 0; i < iterations; i++)

mattwarren

;  270:             for (int i = 0; i < iterations; i++)
0000005f  xor         edx,edx 
00000061  mov         dword ptr [ebp-10h],edx 
00000064  test        ebx,ebx 
00000066  jle         00000092 
;  271:             {
;  272:                 result = Math.Sqrt(123.456);
00000068  mov         ecx,7277806Ch 
0000006d  call        FFF22C08 
00000072  mov         esi,eax 

mattwarren

;  270:             for (int i = 0; i < iterations; i++)
000000d3  mov         r12d,dword ptr [rbp+68h] 
000000d7  test        r12d,r12d 
000000da  jle         0000000000000116 
000000dc  xor         ebx,ebx 
000000de  xchg        ax,ax 
;  271:             {
;  272:                 result = Math.Sqrt(123.456);
000000e0  sqrtsd      xmm0,mmword ptr [000002A8h] 
000000e8  movsd       mmword ptr [rbp+20h],xmm0