Performance: Using count/length property instead of count method is faster, less overhead

WalletWasabi.Backend/Controllers/ChaumianCoinJoinController.cs

@@ -170,7 +170,7 @@ public async Task<IActionResult> PostInputsAsync([FromBody, Required]InputsReque
 						}
 						if (Coordinator.AnyRunningRoundContainsInput(inputProof.Input.ToOutPoint(), out List<Alice> tnr))
 						{
-							if (tr.Union(tnr).Count() > tr.Count())
+							if (tr.Union(tnr).Count() > tr.Count)
 							{
 								return BadRequest("Input is already registered in another round.");
 							}
@@ -257,7 +257,7 @@ public async Task<IActionResult> PostInputsAsync([FromBody, Required]InputsReque
 					var acceptedBlindedOutputScripts = new List<uint256>();
 
 					// Calculate expected networkfee to pay after base denomination.
-					int inputCount = inputs.Count();
+					int inputCount = inputs.Count;
 					Money networkFeeToPayAfterBaseDenomination = (inputCount * round.FeePerInputs) + (2 * round.FeePerOutputs);
 
 					// Check if inputs have enough coins.

WalletWasabi.Packager/Program.cs

@@ -696,7 +696,7 @@ private static void Publish()
 					foreach (var file in assetsInfo.EnumerateFiles())
 					{
 						var number = file.Name.Split(new string[] { "WasabiLogo", ".png" }, StringSplitOptions.RemoveEmptyEntries);
-						if (number.Count() == 1 && int.TryParse(number.First(), out int size))
+						if (number.Length == 1 && int.TryParse(number.First(), out int size))
 						{
 							string destFolder = Path.Combine(debUsrShareIconsFolderPath, $"{size}x{size}", "apps");
 							Directory.CreateDirectory(destFolder);

WalletWasabi/Models/ChaumianCoinJoin/CcjRound.cs

@@ -637,7 +637,7 @@ private bool CanUseAdditionalOutputs(Money newDenomination)
 
 					if (changeAmount < Money.Zero)
 					{
-						if (acceptedBlindedOutputScriptsCount < alice.BlindedOutputScripts.Count())
+						if (acceptedBlindedOutputScriptsCount < alice.BlindedOutputScripts.Length)
 						{
 							tinkerWithAdditionalMixingLevels = false;
 						}

WalletWasabi/Models/ChaumianCoinJoin/MixingLevels.cs

@@ -1,4 +1,4 @@
-using NBitcoin;
+using NBitcoin;
 using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
@@ -76,7 +76,7 @@ public IEnumerable<SchnorrPubKey> SchnorrPubKeys
 		{
 			get
 			{
-				if (_schnorrPubKeys?.Count() != Levels?.Count()) // Signing keys don't change, but more levels may be added. (Although even that's unlikely.)
+				if (_schnorrPubKeys?.Count() != Levels?.Count) // Signing keys don't change, but more levels may be added. (Although even that's unlikely.)
 				{
 					_schnorrPubKeys = Levels.Select(x => x.Signer.GetSchnorrPubKey());
 				}
@@ -85,6 +85,6 @@ public IEnumerable<SchnorrPubKey> SchnorrPubKeys
 			set { _schnorrPubKeys = value; }
 		}
 
-		public int GetMaxLevel() => Levels.Count() - 1;
+		public int GetMaxLevel() => Levels.Count - 1;
 	}
 }

WalletWasabi/Services/WalletService.cs

@@ -340,7 +340,7 @@ await BitcoinStore.IndexStore.ForeachFiltersAsync(async (filterModel) =>
 									}
 								}
 
-								if (cnt != unconfirmedTransactions.Count())
+								if (cnt != unconfirmedTransactions.Length)
 								{
 									SerializeTransactionCache();
 								}