"preview mode"

[crisdosaygo]

I think a good way to conserve resources for potentially large jobs (large PDFs, 1000s of pages, displaying binary files, etc). Is to limit the output to the first 100 pages. And then put a link in the top that says (decode more). Which just runs the command again, but this time selects any remaining pages (if indeed this is possible!!). There are multiple ways to do this (limit to first mb of binary file) that may need to be different for different types.