dear all,

I am doing a 'read' operation on a non-blocking FILE stream attached to the serial port. Every non-empty read (about 120 bytes) is performed in less than 200 us. However, if no data in buffer, read returns -1 but the operation takes 1500 us or more in average. Too much for my application...

Any explanation?
Any workaround?

Best regards
Jesús
Spain

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