38% increase by using DEDICATED_SPI vs SHARED_SPI

ArdSCSinoV2/ArdSCSinoV2.ino

@@ -61,7 +61,7 @@
 #define MAX_BLOCKSIZE 1024     // Maximum BLOCK size
 
 // SDFAT
-#define SD1_CONFIG SdSpiConfig(PA4, SHARED_SPI, SD_SCK_MHZ(SPI_FULL_SPEED), &SPI)
+#define SD1_CONFIG SdSpiConfig(PA4, DEDICATED_SPI, SD_SCK_MHZ(SPI_FULL_SPEED), &SPI)
 SdFs SD;
 
 #if DEBUG