compression

is jQuery 1.4.2 compatible with Closure Compiler?

According to the official release statement version 1.4 has been re-written to be compressed with Closure Compiler yet when I use the online version of closure compiler I get 130 warnings. This is the code I use. // ==ClosureCompiler== // @compilation_level ADVANCED_OPTIMIZATIONS // @output_file_name default.js // @code_url http://ajax...

How can I call winrar in perl on windows

Is it possible to call winrar through perl on a windows system, such as perl -e "rar a -rr10 -s c:\backups\backup.rar @backup.lst" If so, is there a more efficient way to do this? I've looked up "perl -e" +winrar on google, however none of the results gave me any answer that was remotely close to what i was looking for. The system Im...

IIS 6 compression configuration as told by Jeff

Hi guys, I've been reading up on the merits of IIS 6 compression over at CodingHorror (here), but I don't get where I'm supposed to make those alterations. Web.config or somewhere else? Thanks! ...

Using VB6 + WSH with Windows Compression

Having trouble with WSH and Windows Compression. My goal is to be able to zip up files (not folders, but individual files from various locations, which I have stored in an array) using the built-in Windows Compression. I am using VB6. Here is my routine (vb6 code): Dim objShell Dim objFolder Set objShell = CreateObject("Shell.Applicat...

Will HttpResponse.Filter buffer the whole data before start the sending?

Hi, An user posts this article about how to use HttpResponse.Filter to compress large amounts of data. But what will happen if I try to transfer a 4G file? will it load the whole file in memory in order to compress it? or otherwise it will compress it chunk by chunk? I mean, I'm doing this right now: public void GetFile(HttpRe...

Php error in closure compiler execution

When I run php-closure i get a PHP error Undefined index: HTTP_IF_NONE_MATCH in <b>/php-closure.php</b> on line <b>183</b> Line 184 of php-closure is trim($_SERVER['HTTP_IF_NONE_MATCH']) == $etag) { This error only happens when closure has already written the compressed javascript file to the directory once, if the directory is em...

Which Flash video format is more compressed, FLV or H264?

I read an Adobe article which demonstrated H.264 video playback support in Flash Player. Would video encoded in this format be more compressed than typical FLV videos? Should I be using this format for video I place on websites from now on? ...

Large number array compression

Hi All, I've got a javascript application that sends a large amount of numerical data down the wire. This data is then stored in a database. I am having size issues (too much bandwidth, database getting too big). I am now ready to sacrifice some performance for compression. I was thinking of implementing a base 62 number.toString(62...

GZipStream or DeflateStream class?

The MSDN documentation tells me the following: The GZipStream class uses the gzip data format, which includes a cyclic redundancy check value for detecting data corruption. The gzip data format uses the same compression algorithm as the DeflateStream class. It seems GZipStream adds some extra data to the output (relative...

Maximum compression of a MSI install using WIX

I used to build installs for an app with NSIS and the final self extractor was 1.2 MB. Now I need to use WIX due to operational needs and the same install comes out at 4.2 MB. I set the compressed flags as the docs and specs indicated on the package node. Using 7z to zip the MSI results in a 2.4 MB zip file. Question: How can I do a max...

Updating gzip library in jre

Is there a way to update gzip library that JRE uses? There is a bug in gzip library that is used by latest JRE, and it has been fixed in later version of gzip library, so I would like to make latest JRE work by updating just gzip. Bug is in a native code from gzip library that JRE uses. ...

Efficiently storing a list of prime numbers

This article says: Every prime number can be expressed as 30k±1, 30k±7, 30k±11, or 30k±13 for some k. That means we can use eight bits per thirty numbers to store all the primes; a million primes can be compressed to 33,334 bytes "That means we can use eight bits per thirty numbers to store all the primes" This "eigh...

smart reversing of compressed javascript with obscured variable & function names ?

Hello, I want to know if there exists a tool to help in reversing a compressed javascript that has obscure variable names. I am not looking for a pretty-printing beautifier, but for a tool that actually knows how to change & propagate variable name choices. Let me be more specific : - some of the functions belong to the 'public' API ...

Script to change the compression of gziped files

I was trying to change the compression of some gzip files from the default compression level (6) or any other compression level to the maximum compression level (9). Does anyone know how? ...

Reconstructing trees from a "fingerprint"

I've done my SO and Google research, and haven't found anyone who has tackled this before, or at least, anyone who has written about it. My question is, given a "universal" tree of arbitrary height, with each node able to have an arbitrary number of branches, is there a way to uniquely (and efficiently) "fingerprint" arbitrary sub-trees...

On-the-fly lossless image compression

I have an embedded application where an image scanner sends out a stream of 16-bit pixels that are later assembled to a grayscale image. As I need to both save this data locally and forward it to a network interface, I'd like to compress the data stream to reduce the required storage space and network bandwidth. Is there a simple algori...

What's a good introductory-level book / resource for compression?

I'm looking to learn some theory about data/audio/video compression, and would be glad to get some recommendations. Online and print resources are both fine. ...

NTFS-compressing Virtual PC disks (on host and/or guest)

I'm hoping someone here can answer these definitively: Does putting a VHD file in an NTFS-compressed folder on the host improve performance of the virtual machine, diminish performance, or neither? What about using NTFS compression within the guest? Does using compresssion on either the host or the guest lead to any problems like read ...

jQuery compression leads to errors

Hi, could someone please explain when I have a jquery script which runs fine with no errors and then compress and upload it then returns errors? Much appreciated. EDIT The only error im getting using jsLint is: Error: Implied global: $ 3,25,27,28,31,32,34,35,36,38,45,46,47,49,50,61,63,64,65,67,71,75,79,83,87,91,94,95,96,98,101,102,10...

HTTP compression - can I configure a client to compress the data sent to a server?

Hello, I'm using IIS 7 as web server for my application. If I enable dynamic content compression in the server, will this also enable clients to send compressed data to the server, if they can? I mean, my application uses SOAP webservices, and clients usually send large chunks of data to the server. The clients are written in C#/.NET. ...