Really slow Command Execution I2C .NET

Hello BeagleBone Community,

I am currently taking a somewhat unconventional approach to Beagelbone programming.
But now I have a problem for which I can not find a solution.
I have a problem with the speed of the processing of two I2C commands.
The bus is operated with 100kHZ and this speed was also measured with an oscilloscope.
But between the processing of two I2C commands is now a time of 13ms, with which I unfortunately can not work.

I link you below a picture with my Github-issue, maybe someone here has an idea if this behavior is normal or how I can fix this problem.
I would be grateful for any help.

2021-03-05 21_19_15-.png