What is refresh rate ( update rate) for gyroscop and accelerometer ? If you write in the register the following values in mpu6050 :
SMPLRT_DIV --> 19
CONFIG --> 2 ( DLPF off )
I would suggest the first thing is to look at the register map of MPU6050 ( that is mostly named as register map MPU6000)
According to the formula given in the CONFIG register description
Sample Rate = Gyroscope output rate / (1+SMPLRT_DIV)
Over here you have chosen Gyroscope rate as 1KHz , hence your sample rate comes to 50 Hz i.e 50 Samples per second.