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05 September 2017, 00:11
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#1 |
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Registered User
Join Date: Dec 2015
Location: Poland
Posts: 189
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Probably fastest decompression algorythm on amiga 500
Hello
I find it on some forum, and find it interesting enough to share this with you. Someone has created its own LZ4 derivative optimised for Motorola 68000 with decompression speed 760kB per second, which is i believe the fastest there is on Amiga. https://groups.google.com/forum/#!to...4c/oe1IWpuk8tE Sometimes such fst decompression routine could be handy. |
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05 September 2017, 10:17
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#2 |
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Registered User
Join Date: Dec 2014
Location: germany
Posts: 439
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The author of the LZ4-packer (Stephane Dallongeville) presented it some time ago here at EAB: http://eab.abime.net/showpost.php?p=...8&postcount=17 . Unfortunately, his account is not active here anymore.
It's really a nice decompressor, really fast with a reasonable compression ratio. |
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06 September 2017, 17:18
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#3 |
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Registered User
Join Date: May 2013
Location: Grimstad / Norway
Posts: 839
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Didn't the XPK suite have some tool to dump info about the implementations - IIRC there was one doing >800K/s?
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07 September 2017, 08:09
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#4 | |
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Registered User
Join Date: Mar 2017
Location: Tallinn / Estonia
Posts: 74
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Quote:
However it is made on 68060, so it is directly not usable. But I think we can see there that the speedy ones are not the best compression wise  There are some candidates though: FAST (no surprise there) and SLZ3 (which is a bit surprising). Maybe you can try those? |
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07 September 2017, 09:17
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#5 |
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Registered User
Join Date: May 2013
Location: Grimstad / Norway
Posts: 839
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My faint memory tells me this particular one stored the compressed data in reverse direction. I could be wrong about the speed of it.
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