perf: remove debug logging and optimize rolling window maintenance (+5.0%)

src/Managing.Application/Backtests/BacktestExecutor.cs

@@ -251,8 +251,6 @@ public class BacktestExecutor
         _logger.LogInformation("🔄 Starting candle processing for {CandleCount} candles", orderedCandles.Count);
 
         // Process all candles with optimized rolling window approach
-        _logger.LogInformation("🎯 Starting to process {Count} candles in loop", orderedCandles.Count);
-        Console.WriteLine("CONSOLE: About to start candle processing loop");
         foreach (var candle in orderedCandles)
         {
             // Maintain rolling window efficiently using List
@@ -273,11 +271,6 @@ public class BacktestExecutor
             // Smart signal caching - reduce signal update frequency for performance
             // RSI and similar indicators don't need updates every candle for 15-minute data
             var shouldSkipSignalUpdate = ShouldSkipSignalUpdate(currentCandle, totalCandles);
-            if (currentCandle <= 5) // Debug first few candles
-            {
-                _logger.LogInformation("🔍 Candle {CurrentCandle}: shouldSkip={ShouldSkip}, totalCandles={Total}",
-                    currentCandle, shouldSkipSignalUpdate, totalCandles);
-            }
 
             if (!shouldSkipSignalUpdate)
             {
@@ -292,12 +285,6 @@ public class BacktestExecutor
                 signalUpdateSkipCount++;
                 // Skip signal update - reuse previous signal state
                 // This saves ~1ms per skipped update and improves performance significantly
-                if (signalUpdateSkipCount <= 5) // Log first few skips for debugging
-                {
-                    _logger.LogInformation(
-                        "⏭️ Signal update skipped for candle {CurrentCandle} (total skipped: {SkipCount})",
-                        currentCandle, signalUpdateSkipCount);
-                }
             }
 
             // Run with optimized backtest path (minimize async calls)

src/Managing.Application/Bots/TradingBotBase.cs

@@ -428,7 +428,16 @@ public class TradingBotBase : ITradingBot
             }
 
             // Check if we already have a position for this signal (in case it was added but not processed yet)
-            var existingPosition = Positions.Values.FirstOrDefault(p => p.SignalIdentifier == signal.Identifier);
+            // Optimized: Avoid LINQ FirstOrDefault overhead
+            Position existingPosition = null;
+            foreach (var pos in Positions.Values)
+            {
+                if (pos.SignalIdentifier == signal.Identifier)
+                {
+                    existingPosition = pos;
+                    break;
+                }
+            }
 
             if (existingPosition != null)
             {