Help? SPI communication slow
Try this,,,,there is no need to select same slave and end transmission for every count,,,,you can end it after all 10000 counts are finished

  mraa_gpio_write(ss_o, 0);  // ss_o is slave select one  
  for(i = 0; i &lt; 10000; i++) 
    {
        mraa_spi_write(spi, 0x60); // transfer 1 byte via spi    
    }
mraa_gpio_write(ss_o, 1);  // end transmission


hope this helps