rfid write speed is low for me

hi
I used the rfid-rc522 lab in my project. Runtime execution time (MFRC522 :: StatusCode) mfrc522.MIFARE_Write (blockAddr, data, 16); 13 to 14ms. I need time below 4 milliseconds because the program's speed is not too high. So I have to use a direct command or an assembly. please guide me