GLCM texture analysis takes long time after resampling and masking

I have a Tandem-x backscatter image and I applied GLCM texture analysis on it and I got the result in 2 minutes.
Then before applying GLCM texture analysis, I masked one island on the backscatter image and also did resampling (I changed a little its dimension), then I applied GLCM texture analysis on this result but I do not why after 40 minutes, it is still writing the product and I do not have result!!!
I do not know why this is happening?