Recommended file size for fast Show Analyzer processing?

Does anyone have any recommendation for the recommended file size when processing files with ShowAnalyzer setting on?

Do you recommend 500 MB files, or 1 GB files? (as in 30 mins file or 1hr file)?

I am doing now both and wondering if I should make all my files 30 mins in size (close to 500 MB), as I am seeing them processed faster.

I understand that a smaller file will get processed faster, but will ShowAnalyzer work even better on a smaller 500 MB file versus 1 GB file? (aka remove ads even better)?

Thank you!