R.O.C compression software - Fast compression speed

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R.O.C compression software - Fast compression speed

Post  Yann on Sat 21 Mar - 16:57

R.O.C (Reduced Offset Compressor) is a new compression engine developped to reach High Compression Speed. It uses a mixture of ROLZ, LZP & RLE techniques to reach its objectives. It is the first compressor available on HP4X to not belong to the old generic LZ77 family.

R.O.C is indeed very fast (nearly 5x faster than standard BZ, see benchmark results).
R.O.C also uses very little memory (2KB).
Both properties combined makes it a very interesting choice for older systems with limited RAM and CPU (such as HP48).


Current Version : R.O.C v0.6 : HP48 & HP49/50 Binaries

What's new :
- Slightly improved compression rate

Benchmark Comparison :
HP49G
Comparison
BZ49R.O.C
BZ2.speed
Memory Req.
11 KB
2 KB
9 KB
Compression Ratio
2.16
-5%
+0%
Encoding Speed
1.02 KB/S
+350%
+100%
Decoding Speed
17.5 KB/S
-10%
+45%
You may also download the benchmark suite, and check the results with your own calculator.

Embedded Versions

Embedded versions of R.O.C are provided to developpers.

It consists of 3 parts :
- the Encoder 'eROC' (stand-alone, no statistics)
- the Decoder 'uROC'
- the Tester 'isROC', which tells if level 1 object is compressed by R.O.C or not.


Last edited by Admin on Thu 30 Jul - 18:00; edited 12 times in total

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History

Post  Yann on Wed 25 Mar - 19:35

.
R.O.C v0.5 : HP48 & HP49/50 Binaries

initial public release


Last edited by Admin on Mon 6 Apr - 23:29; edited 1 time in total

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Detailed benchmark results

Post  Yann on Wed 25 Mar - 19:36

.

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Re: R.O.C compression software - Fast compression speed

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