After replacing /usr/lib/cups/filter/pdftops with the shell-script
-------------------------------------------------------------------------------------------------------- #!/bin/sh
/usr/bin/acroread -toPostScript -optimizeForSpeed -level3 -expand -size a4 --------------------------------------------------------------------------------------------------------
I've lost duplex printing but it's very fast and high-quality!
After replacing /usr/lib/ cups/filter/ pdftops with the shell-script
------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------
#!/bin/sh
/usr/bin/acroread -toPostScript -optimizeForSpeed -level3 -expand -size a4 ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------
-------
I've lost duplex printing but it's very fast and high-quality!