Limited refresh rate for notify characteristics

[fgaetani]

Hi, I found a problem in curieBLE library with the subscribe at notify characteristics. My goal is to read with a 50Hz refresh rate the value of a characteristic updated at 50Hz through a BLE device. There are not problem in notify, but in subscribe, because through other bluetooth devices I can read easly the data at 50Hz. The maximum limit detected is 20Hz, the value is updated every 50ms constant! How can I solve the problem?
Thank you very much for your support.