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Avoid unnecessary memory allocation/relocation

adaptive-webui-19844
Chocobo1 1 year ago
parent
commit
03d3552ee0
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  1. 19
      src/base/http/connection.cpp
  2. 2
      src/base/net/smtp.cpp
  3. 2
      src/base/path.cpp

19
src/base/http/connection.cpp

@ -46,6 +46,10 @@ Connection::Connection(QTcpSocket *socket, IRequestHandler *requestHandler, QObj @@ -46,6 +46,10 @@ Connection::Connection(QTcpSocket *socket, IRequestHandler *requestHandler, QObj
{
m_socket->setParent(this);
// reserve common size for requests, don't use the max allowed size which is too big for
// memory constrained platforms
m_receivedData.reserve(1024 * 1024);
// reset timer when there are activity
m_idleTimer.start();
connect(m_socket, &QIODevice::readyRead, this, [this]()
@ -66,7 +70,18 @@ Connection::~Connection() @@ -66,7 +70,18 @@ Connection::~Connection()
void Connection::read()
{
m_receivedData.append(m_socket->readAll());
// reuse existing buffer and avoid unnecessary memory allocation/relocation
const qsizetype previousSize = m_receivedData.size();
const qint64 bytesAvailable = m_socket->bytesAvailable();
m_receivedData.resize(previousSize + bytesAvailable);
const qint64 bytesRead = m_socket->read((m_receivedData.data() + previousSize), bytesAvailable);
if (Q_UNLIKELY(bytesRead < 0))
{
m_socket->close();
return;
}
if (Q_UNLIKELY(bytesRead < bytesAvailable))
m_receivedData.chop(bytesAvailable - bytesRead);
while (!m_receivedData.isEmpty())
{
@ -116,7 +131,7 @@ void Connection::read() @@ -116,7 +131,7 @@ void Connection::read()
resp.headers[HEADER_CONNECTION] = u"keep-alive"_s;
sendResponse(resp);
m_receivedData = m_receivedData.mid(result.frameSize);
m_receivedData.remove(0, result.frameSize);
}
break;

2
src/base/net/smtp.cpp

@ -191,7 +191,7 @@ void Smtp::readyRead() @@ -191,7 +191,7 @@ void Smtp::readyRead()
const int pos = m_buffer.indexOf("\r\n");
if (pos < 0) return; // Loop exit condition
const QByteArray line = m_buffer.left(pos);
m_buffer = m_buffer.mid(pos + 2);
m_buffer.remove(0, (pos + 2));
qDebug() << "Response line:" << line;
// Extract response code
const QByteArray code = line.left(3);

2
src/base/path.cpp

@ -318,7 +318,7 @@ void Path::stripRootFolder(PathList &filePaths) @@ -318,7 +318,7 @@ void Path::stripRootFolder(PathList &filePaths)
return;
for (Path &filePath : filePaths)
filePath.m_pathStr = filePath.m_pathStr.mid(commonRootFolder.m_pathStr.size() + 1);
filePath.m_pathStr.remove(0, (commonRootFolder.m_pathStr.size() + 1));
}
void Path::addRootFolder(PathList &filePaths, const Path &rootFolder)

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