Quote:
Originally Posted by Thcm
We're using an optimized version by Soci for our c64 productions. It packs a lot faster. You can find it here with slightly changed format: https://github.com/bboxy/bitfire Maybe it can be improved for larger files > 64kb which should improve compression. |
Thanks.
I've some figures for the speed (Zombies.SHP file, 240KiB):
- original version: TotalMinutes 14,95
- 'bitfire' version: TotalMinutes 10,46
So this version is sure faster, but in the same magnitude, so do not expect a life changer
Remarks:
Original ZX0 seems compiled with 32-bit Open Watcom C, I haven't recompiled the sources.
I compiled the 'bitfire' version with GCC11.2 (-O3, in 32-bit mode to be a little more fair, it's probably a bit faster if compiled in native 64-bit).
Code from repository do not compile straight away because it lack an header file, but it is related to sfx support so the related code can be removed without problems (but it must be reported to Tobias).
About the maximum reachable LZ offset: it's hardcoded to
MAX_OFFSET_ZX0 32640
Of course it can't be modified like it was nothing, because there is an overflow in bitcoding, so you have to work a little to see the effects of a change in that case (at least 'virtualize' a new bitcoding).