1
clrmame Discussion / ZIP compression level
« on: 04 March 2020, 22:03 »
Hi all
new to the forum, even though I've been lurking around here for ages
I'd like to reduce the ZIP compression level apparently hard-wired into cmp...
A search netted me that the ZIP compressor tab has been removed like... 9yrs ago, and apparently there's no INI file option to tame it down - differently from RAR and 7Z.
I can see that every ZIP file produced when rebuilding (I use recompress) defaults to DeflateMaximum compression, which I assume to be a setting of 9 in the 7z DLL scale.
Long story short, the maxed out ZIP compression level takes way too much time for my frequent update batches..
Is there anything I can do for bringing it down a couple notches? Even a cmpro.ini config line (similar to the RAR and 7z entries there) would save the day for me!
Thanks in advance, and my compliments for CMP!!!
PS:
RATIONALE: I had some tests with the latest stable 7z/ZIP (deflate) compression levels:
Normal (5): Time=1, Size=100%
Maximum (7): Time=2-3x, Size=around 95-97%
Ultra (9): Time=10x (!), Size=around 90-93%
Default compression level in CMP would seem to be set to Ultra (9).. Sigh
new to the forum, even though I've been lurking around here for ages
I'd like to reduce the ZIP compression level apparently hard-wired into cmp...
A search netted me that the ZIP compressor tab has been removed like... 9yrs ago, and apparently there's no INI file option to tame it down - differently from RAR and 7Z.
I can see that every ZIP file produced when rebuilding (I use recompress) defaults to DeflateMaximum compression, which I assume to be a setting of 9 in the 7z DLL scale.
Long story short, the maxed out ZIP compression level takes way too much time for my frequent update batches..
Is there anything I can do for bringing it down a couple notches? Even a cmpro.ini config line (similar to the RAR and 7z entries there) would save the day for me!
Thanks in advance, and my compliments for CMP!!!
PS:
RATIONALE: I had some tests with the latest stable 7z/ZIP (deflate) compression levels:
Normal (5): Time=1, Size=100%
Maximum (7): Time=2-3x, Size=around 95-97%
Ultra (9): Time=10x (!), Size=around 90-93%
Default compression level in CMP would seem to be set to Ultra (9).. Sigh