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Store less stuff in session data and reduce save frequency for better performance.

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Wizou 2025-04-06 19:48:43 +02:00
parent f495f59bc8
commit 6d238dc528
4 changed files with 67 additions and 70 deletions
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22
Examples/Program_Heroku.cs
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@ -62,10 +62,8 @@ namespace WTelegramClientTest
{
private readonly NpgsqlConnection _sql;
private readonly string _sessionName;
private byte[] _data;
private int _dataLen;
private DateTime _lastWrite;
private Task _delayedWrite;
private readonly byte[] _data;
private readonly int _dataLen;
/// <param name="databaseUrl">Heroku DB URL of the form "postgres://user:password@host:port/database"</param>
/// <param name="sessionName">Entry name for the session data in the WTelegram_sessions table (default: "Heroku")</param>
@ -85,7 +83,6 @@ namespace WTelegramClientTest
protected override void Dispose(bool disposing)
{
_delayedWrite?.Wait();
_sql.Dispose();
}
@ -97,18 +94,9 @@ namespace WTelegramClientTest
public override void Write(byte[] buffer, int offset, int count) // Write call and buffer modifications are done within a lock()
{
_data = buffer; _dataLen = count;
if (_delayedWrite != null) return;
var left = 1000 - (int)(DateTime.UtcNow - _lastWrite).TotalMilliseconds;
if (left < 0)
{
using var cmd = new NpgsqlCommand($"INSERT INTO WTelegram_sessions (name, data) VALUES ('{_sessionName}', @data) ON CONFLICT (name) DO UPDATE SET data = EXCLUDED.data", _sql);
cmd.Parameters.AddWithValue("data", count == buffer.Length ? buffer : buffer[offset..(offset + count)]);
cmd.ExecuteNonQuery();
_lastWrite = DateTime.UtcNow;
}
else // delay writings for a full second
_delayedWrite = Task.Delay(left).ContinueWith(t => { lock (this) { _delayedWrite = null; Write(_data, 0, _dataLen); } });
using var cmd = new NpgsqlCommand($"INSERT INTO WTelegram_sessions (name, data) VALUES ('{_sessionName}', @data) ON CONFLICT (name) DO UPDATE SET data = EXCLUDED.data", _sql);
cmd.Parameters.AddWithValue("data", count == buffer.Length ? buffer : buffer[offset..(offset + count)]);
cmd.ExecuteNonQuery();
}
public override long Length => _dataLen;