[cups.general] HL5350 and Kyo1100N printing very slow with manufacturer PPD-file

[Johannes Meixner]

Hello,

On Feb 24 01:31 E. Gerlach wrote (shortened):
> why are modern laser printers HL5350DN and Kyocera 1100N very slow with
> printing images (scanned documents black/white 200KByte) on A4 paper
> sheets using the PPD-file delivered by manufacturer on CD? - It lasts
> about one minute per sheet.

Rendering happens in the printer via its built-in PostScript
processing unit with the CPU and memeory which is built-in
in the printer and the printer's default output resolution
is perhaps set to 1200 dpi grayscale with 8-bits-per-pixel.

> Using the HP laserjet5e-PPD-file for HL5350DN the printer processing
> time is about 5 to 10 seconds only.

Rendering happens on the CUPS server machine via Ghostscript
with all the computing power what this machine has and a
readymade 600 dpi monochrome 1-bit-per-pixel "bitmap"
is sent to the printer.

A 1200 dpi 8-bits-per-pixel image needs 32 times more memory
than a 600 dpi 1-bit-per-pixel image.

See
http://en.opensuse.org/SDB:Purchasing_a_Printer_and_Compatibility
"Print Quality (DPI vs. Memory Usage)" and
"Potential Problems with PostScript Printers"


Kind Regards
Johannes Meixner
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