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From: Jonathan Toomim <j@toom.im>
To: Peter Tschipper <peter.tschipper@gmail.com>
Cc: 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 16:30:20 -0800	[thread overview]
Message-ID: <725E6BCC-E839-4F91-9BCA-95D0549DC3C7@toom.im> (raw)
In-Reply-To: <5659BEC9.50307@gmail.com>


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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> 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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  reply	other threads:[~2015-11-29  0:30 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 [this message]
2015-11-29  5:15                   ` Peter Tschipper
     [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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