vector caching to improve performance

Author: smasherprog

RemoteDesktop_GatewayExample/RemoteDesktop_GatewayExample.csproj

@@ -234,7 +234,7 @@
           <AutoAssignPort>True</AutoAssignPort>
           <DevelopmentServerPort>3406</DevelopmentServerPort>
           <DevelopmentServerVPath>/</DevelopmentServerVPath>
-          <IISUrl>http://localhost:3406/</IISUrl>
+          <IISUrl>http://scott-pc:3406/</IISUrl>
           <NTLMAuthentication>False</NTLMAuthentication>
           <UseCustomServer>False</UseCustomServer>
           <CustomServerUrl>

RemoteDesktop_Library/Image.h

@@ -10,6 +10,7 @@ namespace RemoteDesktop{
 		extern bool GrazyScale;
 	}
 	namespace INTERNAL{
+		//improves speed when memory allocations are kept down because vector resize always does a memset on the unintialized elements
 		extern std::vector<std::vector<char>> BufferCache;
 		extern std::mutex BufferCacheLock;
 	}
@@ -22,23 +23,41 @@ namespace RemoteDesktop{
 		Image(const Image& other) = delete;
 		Image() {}
 		explicit Image(char* d, int h, int w) :Pixel_Stride(4), Height(h), Width(w) {
-
+			if (!INTERNAL::BufferCache.empty()){
+				std::lock_guard<std::mutex> lock(INTERNAL::BufferCacheLock);
+				if (!INTERNAL::BufferCache.empty()){
+					data = std::move(INTERNAL::BufferCache.back());
+					INTERNAL::BufferCache.pop_back();
+				}
+			}
 			data.resize(Pixel_Stride*Height*Width); memcpy(data.data(), d, Pixel_Stride);
 		}
 		explicit Image(int h, int w) : Pixel_Stride(4), Height(h), Width(w)  {
+			if (!INTERNAL::BufferCache.empty()){
+				std::lock_guard<std::mutex> lock(INTERNAL::BufferCacheLock);
+				if (!INTERNAL::BufferCache.empty()){
+					data = std::move(INTERNAL::BufferCache.back());
+					INTERNAL::BufferCache.pop_back();
+				}
+			}
 			data.resize(Pixel_Stride*Height*Width);
 		}
 		Image(Image&& other) :data(std::move(other.data)), Height(std::move(other.Height)), Width(std::move(other.Width)), Compressed(std::move(other.Compressed)){
-		
+
 		}
 		Image& operator=(Image&& other){
-	
+
 			data = std::move(other.data);
-			Height=std::move(other.Height);
-			Width=std::move(other.Width);
+			Height = std::move(other.Height);
+			Width = std::move(other.Width);
 			Compressed = std::move(other.Compressed);
 		}
-
+		~Image(){
+			if (data.size() > 100){
+				std::lock_guard<std::mutex> lock(INTERNAL::BufferCacheLock);
+				INTERNAL::BufferCache.emplace_back(std::move(data));
+			}
+		}
 		static Image Create_from_Compressed_Data(char* d, int size_in_bytes, int h, int w);
 		void Compress();
 		void Decompress();