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NarrowRowDynamicWriteSyncBenchmark.cs
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NarrowRowDynamicWriteSyncBenchmark.cs
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using System;
using System.Collections.Generic;
using System.Dynamic;
using System.IO;
using System.Linq;
using System.Reflection;
using BenchmarkDotNet.Attributes;
namespace Cesil.Benchmark
{
[BenchmarkCategory("Write", "Dynamic")]
public class NarrowRowDynamicWriteSyncBenchmark
{
private const int NUM_SHALLOW = 10;
private const int NUM_DEEP = 10_000;
[ParamsSource(nameof(KnownRowSets))]
public string RowSet { get; set; }
[ParamsSource(nameof(KnownTypes))]
public Type Type { get; set; }
public IEnumerable<string> KnownRowSets => new[] { "ShallowRows", "DeepRows" };
public IEnumerable<Type> KnownTypes =>
new[]
{
typeof(byte),
typeof(sbyte),
typeof(byte?),
typeof(sbyte?),
typeof(short),
typeof(ushort),
typeof(short?),
typeof(ushort?),
typeof(int),
typeof(uint),
typeof(int?),
typeof(uint?),
typeof(long),
typeof(ulong),
typeof(long?),
typeof(ulong?),
typeof(float),
typeof(float?),
typeof(double),
typeof(double?),
typeof(decimal),
typeof(decimal?),
typeof(string),
typeof(char),
typeof(char?),
typeof(Guid),
typeof(Guid?),
typeof(DateTime),
typeof(DateTime?),
typeof(DateTimeOffset),
typeof(DateTimeOffset?),
typeof(Uri),
typeof(NarrowRowEnum),
typeof(NarrowRowEnum?),
typeof(NarrowRowFlagsEnum),
typeof(NarrowRowFlagsEnum?)
};
private Action<TextWriter> WriteStaticRows;
private Action<TextWriter> WriteDynamicRows_Static;
private Action<TextWriter> WriteDynamicRows_Cesil;
private Action<TextWriter> WriteDynamicRows_ExpandoObject;
private Action<TextWriter> WriteDynamicRows_Custom;
[GlobalSetup]
public void Initialize()
{
WriteStaticRows = Make(MakeStaticRowWriter_Mtd);
WriteDynamicRows_Static = Make(MakeDynamicStaticRowWriter_Mtd);
WriteDynamicRows_Cesil = Make(MakeDynamicCesilRowWriter_Mtd);
WriteDynamicRows_ExpandoObject = Make(MakeDynamicExpandoRowWriter_Mtd);
WriteDynamicRows_Custom = Make(MakeDynamicCustomRowWriter_Mtd);
Action<TextWriter> Make(MethodInfo mtd)
{
var bound = mtd.MakeGenericMethod(Type);
var res = bound.Invoke(this, Array.Empty<object>());
return (Action<TextWriter>)res;
}
}
public void InitializeAndTest()
{
foreach (var type in KnownTypes)
{
Type = type;
foreach (var rows in KnownRowSets)
{
RowSet = rows;
WriteStaticRows = WriteDynamicRows_Static = WriteDynamicRows_Cesil = WriteDynamicRows_ExpandoObject = WriteDynamicRows_Custom = null;
Initialize();
var s = Write(WriteStaticRows);
var d = Write(WriteDynamicRows_Static);
var c = Write(WriteDynamicRows_Cesil);
var e = Write(WriteDynamicRows_ExpandoObject);
var e2 = Write(WriteDynamicRows_Custom);
if (s != d) throw new Exception();
if (s != c) throw new Exception();
if (s != e) throw new Exception();
if (s != e2) throw new Exception();
}
}
static string Write(Action<TextWriter> del)
{
using (var txt = new StringWriter())
{
del(txt);
return txt.ToString();
}
}
}
[Benchmark(Baseline = true)]
public void Static()
{
WriteStaticRows(TextWriter.Null);
}
[Benchmark]
public void Dynamic_Static()
{
WriteDynamicRows_Static(TextWriter.Null);
}
[Benchmark]
public void Dynamic_Cesil()
{
WriteDynamicRows_Cesil(TextWriter.Null);
}
[Benchmark]
public void Dynamic_ExpandoObject()
{
WriteDynamicRows_ExpandoObject(TextWriter.Null);
}
[Benchmark]
public void Dynamic_Custom()
{
WriteDynamicRows_Custom(TextWriter.Null);
}
private static MethodInfo MakeStaticRowWriter_Mtd = typeof(NarrowRowDynamicWriteSyncBenchmark).GetMethod(nameof(MakeStaticRowWriter), BindingFlags.NonPublic | BindingFlags.Instance);
private Action<TextWriter> MakeStaticRowWriter<T>()
{
var rows = GetStaticRows<T>();
var config = Configuration.For<NarrowRow<T>>();
return
(txt) =>
{
using (var csv = config.CreateWriter(txt))
{
csv.WriteAll(rows);
}
};
}
private static MethodInfo MakeDynamicStaticRowWriter_Mtd = typeof(NarrowRowDynamicWriteSyncBenchmark).GetMethod(nameof(MakeDynamicStaticRowWriter), BindingFlags.NonPublic | BindingFlags.Instance);
private Action<TextWriter> MakeDynamicStaticRowWriter<T>()
{
var rows = GetStaticRows<T>();
return MakeDynamicWriter(rows);
}
private static MethodInfo MakeDynamicCesilRowWriter_Mtd = typeof(NarrowRowDynamicWriteSyncBenchmark).GetMethod(nameof(MakeDynamicCesilRowWriter), BindingFlags.NonPublic | BindingFlags.Instance);
private Action<TextWriter> MakeDynamicCesilRowWriter<T>()
{
IEnumerable<dynamic> rows;
{
var staticRows = GetStaticRows<T>();
var staticConfig = Configuration.For<NarrowRow<T>>();
string csvTxt;
using (var txt = new StringWriter())
{
using (var csv = staticConfig.CreateWriter(txt))
{
csv.WriteAll(staticRows);
}
csvTxt = txt.ToString();
}
// have to slap an extra new line on there because this is ambiguous
var lastRow = (object)staticRows.Last().Column;
if (lastRow == null || lastRow.Equals(""))
{
csvTxt += Environment.NewLine;
}
var opts = Options.CreateBuilder(Options.DynamicDefault).WithDynamicRowDisposal(DynamicRowDisposal.OnExplicitDispose).ToOptions();
var noDisposeConfig = Configuration.ForDynamic(opts);
using (var txt = new StringReader(csvTxt))
using (var csv = noDisposeConfig.CreateReader(txt))
{
rows = csv.ReadAll();
}
}
return MakeDynamicWriter(rows);
}
private static MethodInfo MakeDynamicExpandoRowWriter_Mtd = typeof(NarrowRowDynamicWriteSyncBenchmark).GetMethod(nameof(MakeDynamicExpandoRowWriter), BindingFlags.NonPublic | BindingFlags.Instance);
private Action<TextWriter> MakeDynamicExpandoRowWriter<T>()
{
IEnumerable<dynamic> rows;
{
var staticRows = GetStaticRows<T>();
var expandos = new List<ExpandoObject>();
foreach (var row in staticRows)
{
var expandoObj = new ExpandoObject();
var expando = (IDictionary<string, dynamic>)expandoObj;
expando[nameof(row.Column)] = row.Column;
expandos.Add(expandoObj);
}
rows = expandos;
}
return MakeDynamicWriter(rows);
}
private static MethodInfo MakeDynamicCustomRowWriter_Mtd = typeof(NarrowRowDynamicWriteSyncBenchmark).GetMethod(nameof(MakeDynamicCustomRowWriter), BindingFlags.NonPublic | BindingFlags.Instance);
private Action<TextWriter> MakeDynamicCustomRowWriter<T>()
{
IEnumerable<dynamic> rows;
{
var staticRows = GetStaticRows<T>();
var expandos = new List<FakeExpandoObject>();
foreach (var row in staticRows)
{
var expandoObj = new FakeExpandoObject();
var expando = (IDictionary<string, dynamic>)expandoObj;
expando[nameof(row.Column)] = row.Column;
expandos.Add(expandoObj);
}
rows = expandos;
}
return MakeDynamicWriter(rows);
}
private static Action<TextWriter> MakeDynamicWriter(IEnumerable<dynamic> rows)
{
var config = Configuration.ForDynamic();
return
(txt) =>
{
using (var csv = config.CreateWriter(txt))
{
csv.WriteAll(rows);
}
};
}
private IEnumerable<NarrowRow<T>> GetStaticRows<T>()
{
var r = MakeRandom();
IEnumerable<NarrowRow<T>> rows;
switch (RowSet)
{
case "ShallowRows": rows = Enumerable.Range(0, NUM_SHALLOW).Select(_ => NarrowRow<T>.Create(r)).ToArray(); break;
case "DeepRows": rows = Enumerable.Range(0, NUM_DEEP).Select(_ => NarrowRow<T>.Create(r)).ToArray(); break;
default: throw new Exception();
}
return rows;
}
private static Random MakeRandom()
=> new Random(2020_03_04);
}
}