How did you compress it?
Gzipping the 52 MB PDF just shrinks it to 51 MB. You got it to 6.4 and kept it PDF.
Gzipping the 52 MB PDF just shrinks it to 51 MB. You got it to 6.4 and kept it PDF.
gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf