public void BigEndianWritePerformanceTest()
{
// Arrange
var endpoint = EndpointSource.GetNext();
var server = new ModbusTcpServer();
server.Start(endpoint);
var buffer = server.GetHoldingRegisters();
// Act
var sw = Stopwatch.StartNew();
for (int i = 0; i < 1_000_000; i++)
{
buffer.SetBigEndian(address: 1, 12334234.0);
}
// Assert
var elapsed = sw.Elapsed;
server.Stop();
_logger.WriteLine($"Time per 1000 write operations: {elapsed.TotalMilliseconds / 1000} ms");
}
static void DoServerWork(ModbusTcpServer server)
{
var random = new Random();
// Option A: normal performance version, more flexibility
/* get buffer in standard form (Span<short>) */
var registers = server.GetHoldingRegisters();
registers.SetLittleEndian <int>(address: 5, random.Next());
// Option B: high performance version, less flexibility
/* interpret buffer as array of bytes (8 bit) */
var byte_buffer = server.GetHoldingRegisterBuffer <byte>();
byte_buffer[20] = (byte)(random.Next() >> 24);
/* interpret buffer as array of shorts (16 bit) */
var short_buffer = server.GetHoldingRegisterBuffer <short>();
short_buffer[30] = (short)(random.Next(0, 100) >> 16);
/* interpret buffer as array of ints (32 bit) */
var int_buffer = server.GetHoldingRegisterBuffer <int>();
int_buffer[40] = random.Next(0, 100);
}