YangWX/MQTTnet
1
0
Fork 0
mirror of https://github.com/dotnet/MQTTnet.git synced 2026-10-16 17:23:04 +08:00
Code Issues Packages Projects Releases Wiki Activity

Performance optimizations

Browse Source
This commit is contained in:
Christian Kratky
2017-11-25 23:10:48 +01:00
parent 24ab285066
commit 611fabcd01
11 changed files with 105 additions and 88 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Frameworks/MQTTnet.NetStandard/Serializer/MqttPacketSerializer.cs
+21 -17
View File
@@ -1,12 +1,12 @@
using System;
using MQTTnet.Adapter;
using MQTTnet.Exceptions;
using MQTTnet.Packets;
using MQTTnet.Protocol;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using MQTTnet.Adapter;
using MQTTnet.Exceptions;
using MQTTnet.Packets;
using MQTTnet.Protocol;
namespace MQTTnet.Serializer
{
@@ -17,25 +17,29 @@ namespace MQTTnet.Serializer
public MqttProtocolVersion ProtocolVersion { get; set; } = MqttProtocolVersion.V311;
public byte[] Serialize(MqttBasePacket packet)
public IEnumerable<ArraySegment<byte>> Serialize(MqttBasePacket packet)
{
if (packet == null) throw new ArgumentNullException(nameof(packet));
using (var stream = new MemoryStream())
using (var stream = new MemoryStream(128))
using (var writer = new MqttPacketWriter(stream))
{
var fixedHeader = SerializePacket(packet, writer);
var headerBuffer = new List<byte> { fixedHeader };
MqttPacketWriter.WriteRemainingLength((int)stream.Length, headerBuffer);
var remainingLength = (int)stream.Length;
writer.Write(fixedHeader);
MqttPacketWriter.WriteRemainingLength(remainingLength, writer);
var headerLength = (int)stream.Length - remainingLength;
var header = headerBuffer.ToArray();
var body = stream.ToArray();
var buffer = new byte[header.Length + body.Length];
Buffer.BlockCopy(header, 0, buffer, 0, header.Length);
Buffer.BlockCopy(body, 0, buffer, header.Length, body.Length);
return buffer;
#if NET461 || NET452 || NETSTANDARD2_0
var buffer = stream.GetBuffer();
#else
var buffer = stream.ToArray();
#endif
return new List<ArraySegment<byte>>
{
new ArraySegment<byte>(buffer, remainingLength, headerLength),
new ArraySegment<byte>(buffer, 0, remainingLength)
};
}
}