From: Peter Tschipper <peter.tschipper@gmail•com>
To: Bitcoin Dev <bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] further test results for : "Datastream Compression of Blocks and Tx's"
Date: Sat, 28 Nov 2015 21:15:32 -0800 [thread overview]
Message-ID: <565A89F4.6070706@gmail.com> (raw)
In-Reply-To: <725E6BCC-E839-4F91-9BCA-95D0549DC3C7@toom.im>
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yes, you're right, it's just the percentage compressed (size reduction)
On 28/11/2015 4:30 PM, Jonathan Toomim wrote:
> It appears you're using the term "compression ratio" to mean "size
> reduction". A compression ratio is the ratio (compressed /
> uncompressed). A 1 kB file compressed with a 10% compression ratio
> would be 0.1 kB. It seems you're using (1 - compressed/uncompressed),
> meaning that the compressed file would be 0.9 kB.
>
> On Nov 28, 2015, at 6:48 AM, Peter Tschipper via bitcoin-dev
> <bitcoin-dev@lists•linuxfoundation.org
> <mailto:bitcoin-dev@lists•linuxfoundation.org>> wrote:
>
>> The following show the compression ratio acheived for various sizes
>> of data. Zlib is the clear
>> winner for compressibility, with LZOx-999 coming close but at a cost.
>>
>> range Zlib-1 cmp%
>> Zlib-6 cmp% LZOx-1 cmp% LZOx-999 cmp%
>> 0-250b 12.44 12.86 10.79 14.34
>> 250-500b 19.33 12.97 10.34 11.11
>>
>>
>>
>>
>>
>>
>
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next prev parent reply other threads:[~2015-11-29 5:15 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-09 19:18 [bitcoin-dev] request BIP number for: "Support for Datastream Compression" Peter Tschipper
2015-11-09 20:41 ` Johnathan Corgan
2015-11-09 21:04 ` Bob McElrath
2015-11-10 1:58 ` gladoscc
2015-11-10 5:40 ` Johnathan Corgan
2015-11-10 9:44 ` Tier Nolan
[not found] ` <5642172C.701@gmail.com>
2015-11-10 16:17 ` Peter Tschipper
2015-11-10 16:21 ` Jonathan Toomim
2015-11-10 16:30 ` Tier Nolan
2015-11-10 16:46 ` Jeff Garzik
2015-11-10 17:09 ` Peter Tschipper
2015-11-11 18:35 ` Peter Tschipper
2015-11-11 18:49 ` Marco Pontello
2015-11-11 19:05 ` Jonathan Toomim
2015-11-13 21:58 ` [bitcoin-dev] Block Compression (Datastream Compression) test results using the PR#6973 compression prototype Peter Tschipper
2015-11-18 14:00 ` [bitcoin-dev] More findings: " Peter Tschipper
2015-11-11 19:11 ` [bitcoin-dev] request BIP number for: "Support for Datastream Compression" Peter Tschipper
2015-11-28 14:48 ` [bitcoin-dev] further test results for : "Datastream Compression of Blocks and Tx's" Peter Tschipper
2015-11-29 0:30 ` Jonathan Toomim
2015-11-29 5:15 ` Peter Tschipper [this message]
[not found] ` <56421F1E.4050302@gmail.com>
2015-11-10 16:46 ` [bitcoin-dev] request BIP number for: "Support for Datastream Compression" Peter Tschipper
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