Asp.net Web Api开发（第二篇）性能：使用Jil提升Json序列化性能

看了几篇网上关于各种序列化工具的性能对比，在这里再粘贴下：



我们使用了ASP.NET WEB API来提供RESTfull风格的接口给APP调用，默认序列化库用的是：Newtonsoft.Json

为了进一步提高服务端的性能，有必要将序列化库进行替换。从上图可以看出，Jil是最快的Json序列化库了。为了验证其性能，我们也写了相关代码，将Jil和Newtonsoft.Json进行的比较。确实Jil的性能要优越不少。于是决定就用Jil来替换了。

第一步：引用Jil.dll，同目录下也要有Sigil.dll，Jil是基于Sigil开发的。

第二部：编写一个JilFormatter：

using Jil;
using System;
using System.IO;
using System.Net;
using System.Net.Http.Formatting;
using System.Net.Http.Headers;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace RRPService.WebApi.Comm
{
public class JilFormatter: MediaTypeFormatter
{
private readonly Options mJilOptions;

/// <summary>
/// Jil Json序列化器
/// </summary>
public JilFormatter()
{
mJilOptions = new Options(
dateFormat: DateTimeFormat.MillisecondsSinceUnixEpoch,
excludeNulls:true,
includeInherited: true,
serializationNameFormat: SerializationNameFormat.CamelCase);
SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/json"));
SupportedEncodings.Add(new UTF8Encoding(encoderShouldEmitUTF8Identifier: false, throwOnInvalidBytes: true));
SupportedEncodings.Add(new UnicodeEncoding(bigEndian: false, byteOrderMark: true, throwOnInvalidBytes: true));
}
public override bool CanReadType(Type type)
{
if (type == null)
{
throw new ArgumentNullException("type");
}
return true;
}
public override bool CanWriteType(Type type)
{
if (type == null)
{
throw new ArgumentNullException("type");
}
return true;
}
public override Task<object> ReadFromStreamAsync(Type type, Stream readStream, System.Net.Http.HttpContent content, IFormatterLogger formatterLogger)
{
return Task.FromResult(this.DeserializeFromStream(type, readStream));
}
private object DeserializeFromStream(Type type, Stream readStream)
{
try
{
using (var reader = new StreamReader(readStream))
{
MethodInfo method = typeof(JSON).GetMethod("Deserialize", new Type[] { typeof(TextReader), typeof(Options) });
MethodInfo generic = method.MakeGenericMethod(type);
return generic.Invoke(this, new object[] { reader, mJilOptions });
}
}
catch
{
return null;
}
}
public override Task WriteToStreamAsync(Type type, object value, Stream writeStream, System.Net.Http.HttpContent content, TransportContext transportContext)
{
var streamWriter = new StreamWriter(writeStream);
JSON.Serialize(value, streamWriter, mJilOptions);
streamWriter.Flush();
return Task.FromResult(writeStream);
}
}
}

替换默认Json序列化库：

using RRPService.WebApi.Comm;
using System.Web.Http;
using System.Web.Mvc;

namespace RRPService.WebApi.App
{
/// <summary>
/// web api 服务
/// </summary>
public class WebApiApplication : System.Web.HttpApplication
{
/// <summary>
/// 服务启动
/// </summary>
protected void Application_Start()
{
GlobalConfiguration.Configure(WebApiConfig.Register);
HttpConfiguration fConfig = GlobalConfiguration.Configuration;
fConfig.Formatters.Remove(fConfig.Formatters.JsonFormatter);
fConfig.Formatters.Insert(0, new JilFormatter());
}
}
}