pdftk compression option

Question

I use pdftk to compress a pdf using the following command line

pdftk file1.pdf output file2.pdf compress

It works as the w

Answer 1

pdf2ps large.pdf small.pdf is enough, instead of two steps

pdf2ps large.pdf very_large.ps 
ps2pdf very_large.ps small.pdf

However, ps2pdf large.pdf small.pdf is a better choice.

• ps2pdf is much faster
• without additional parameters specified, pdf2ps sometimes produces larger file.