Reduce PDF file size without noticeable quality loss.
reducePDF pdf_file <pdf_file ...>
It uses the commands 'pdftops' and 'ps2pdf' to reduce the PDF files. It can use 'parallel' if installed in your system, to process various pdf files parallelly.
This is a bash script, so, you can just run the reducePDF.sh file or put a symbolic link in any directory of your PATH (e.g. /usr/local/bin).
It runs in Linux, probably in Mac OS too, but not tested.