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Performance refactoring.

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This commit is contained in:
Christian Kratky
2017-07-28 22:21:48 +02:00
parent e021d5a56b
commit 0b0239bcf1
3 changed files with 80 additions and 92 deletions
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MQTTnet.Core/Serializer/MqttPacketWriter.cs
+33 -33
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@@ -11,39 +11,6 @@ namespace MQTTnet.Core.Serializer
{
private readonly MemoryStream _buffer = new MemoryStream(512);
public void InjectFixedHeader(byte fixedHeader)
{
if (_buffer.Length == 0)
{
Write(fixedHeader);
Write(0);
return;
}
var backupBuffer = _buffer.ToArray();
var remainingLength = (int)_buffer.Length;
_buffer.SetLength(0);
_buffer.WriteByte(fixedHeader);
// Alorithm taken from http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html.
var x = remainingLength;
do
{
var encodedByte = x % 128;
x = x / 128;
if (x > 0)
{
encodedByte = encodedByte | 128;
}
_buffer.WriteByte((byte)encodedByte);
} while (x > 0);
_buffer.Write(backupBuffer, 0, backupBuffer.Length);
}
public void InjectFixedHeader(MqttControlPacketType packetType, byte flags = 0)
{
var fixedHeader = (byte)((byte)packetType << 4);
@@ -101,5 +68,38 @@ namespace MQTTnet.Core.Serializer
{
_buffer?.Dispose();
}
private void InjectFixedHeader(byte fixedHeader)
{
if (_buffer.Length == 0)
{
Write(fixedHeader);
Write(0);
return;
}
var backupBuffer = _buffer.ToArray();
var remainingLength = (int)_buffer.Length;
_buffer.SetLength(0);
_buffer.WriteByte(fixedHeader);
// Alorithm taken from http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html.
var x = remainingLength;
do
{
var encodedByte = x % 128;
x = x / 128;
if (x > 0)
{
encodedByte = encodedByte | 128;
}
_buffer.WriteByte((byte)encodedByte);
} while (x > 0);
_buffer.Write(backupBuffer, 0, backupBuffer.Length);
}
}
}