esp8266 gpio interrupt

[roc2]

When calling a gpio interrupt handler, how to calculate the time of when a interrupt occur to start excuting the interrupt handler?
And how to decrease the time of gpio interrupt delay??

[pratik]

The interrupt mechanism does not depend much on programming, it is hardware controlled. Are you getting a very long delay between ISR execution and interrupt input?
A way to measure this would be to set an output pin high in the ISR. Then measure the delay between triggering edge and the rising edge set in the ISR.