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WinRAR 4.20 Beta 1 (32-bit)RARLab - 1.44MB (Logiciel contributif) - |
# Changes in RAR compression:
* RAR general compression algorithm is optimized for better utilization of several processor cores. While some speed gain is possible even in single processor mode, best results are achieved in multi-core environment.Speed gain depends on data type and average file size. Several cores are utilized more efficiently when compressing large files.
* we had to increase memory requirements to achieve higher compression speed. General RAR compression algorithm allocates about 120 MB comparing to 40 MB in WinRAR 4.11
* RAR text compression algorithm cannot utilize several CPU cores efficiently, so its performance in multiprocessor environment is much lower than for general algorithm. Also its decompression speed is much lower than in general algorithm regardless of CPU number. So we decided to disable the text algorithm by default.If you need maximum possible compression ratio for plain text data regardless of speed, you can enable the text compression in "Advanced compression parameter" dialog. Press "Compression..." button on "Advanced" page of archiving dialog to access it. You can also change this option permanently in default compression profile In the command line mode the text compression can be enabled with -mct switch
* "Fastest" (-m1) compression mode also supports several processor cores now. In 4.11 it could use only a single processor core.
# RAR general decompression algorithm speed is slightly improved, though not to same extent as RAR compression. RAR decompression is not able to use several processor cores, so its performance does not depend on a number of cores.
# Changes in ZIP compression:
* now ZIP compression supports several processor cores resulting in noticeably higher performance in multi-core environment. Single CPU ZIP compression is also faster than in 4.11;
* memory use for ZIP compression is increased to about 15 MB.
# Recovery volume creating and processing can use several CPU cores resulting in higher speed. Though, typically hard drive seek speed is a limiting factor for recovery volumes, so this gain is most noticeable when working with solid state drive.
# Now the allowed value for -mt switch is 1 - 32, not 0 - 16 as before.
# "Find files" command can search data in 7-Zip archives. Previously "Find files" did not support .7z archive format.
# Windows 2000 is not supported by WinRAR and WinRAR self-extracting modules anymore.
* RAR general compression algorithm is optimized for better utilization of several processor cores. While some speed gain is possible even in single processor mode, best results are achieved in multi-core environment.Speed gain depends on data type and average file size. Several cores are utilized more efficiently when compressing large files.
* we had to increase memory requirements to achieve higher compression speed. General RAR compression algorithm allocates about 120 MB comparing to 40 MB in WinRAR 4.11
* RAR text compression algorithm cannot utilize several CPU cores efficiently, so its performance in multiprocessor environment is much lower than for general algorithm. Also its decompression speed is much lower than in general algorithm regardless of CPU number. So we decided to disable the text algorithm by default.If you need maximum possible compression ratio for plain text data regardless of speed, you can enable the text compression in "Advanced compression parameter" dialog. Press "Compression..." button on "Advanced" page of archiving dialog to access it. You can also change this option permanently in default compression profile In the command line mode the text compression can be enabled with -mct switch
* "Fastest" (-m1) compression mode also supports several processor cores now. In 4.11 it could use only a single processor core.
# RAR general decompression algorithm speed is slightly improved, though not to same extent as RAR compression. RAR decompression is not able to use several processor cores, so its performance does not depend on a number of cores.
# Changes in ZIP compression:
* now ZIP compression supports several processor cores resulting in noticeably higher performance in multi-core environment. Single CPU ZIP compression is also faster than in 4.11;
* memory use for ZIP compression is increased to about 15 MB.
# Recovery volume creating and processing can use several CPU cores resulting in higher speed. Though, typically hard drive seek speed is a limiting factor for recovery volumes, so this gain is most noticeable when working with solid state drive.
# Now the allowed value for -mt switch is 1 - 32, not 0 - 16 as before.
# "Find files" command can search data in 7-Zip archives. Previously "Find files" did not support .7z archive format.
# Windows 2000 is not supported by WinRAR and WinRAR self-extracting modules anymore.
Téléchargements associés
WinRAR 5.00 Beta 5 (32-bit)- WinRAR 5.00 Beta 5 (64-bit)
Universal Extractor 1.6.1
PC Inspector File Recovery 4.0
CardRecovery 6.10 Build 1210
SyncBack 6.4.3.8
7-Zip 9.22 Beta (64-bit)
Duplicati 1.3.4
PeaZip 4.9.2
PowerArchiver 13.03.02
Beyond Compare 3.3.7
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![Scientists are getting very close to creating an actual invisibility cloak, as separate research teams over the past week have revealed significant advancements in the area. From an invisibility cloak scaled up to be able to hide a person to a quantum invisibility cloak that can hide objects in time, there is no better moment for fans of H.G. Wells and the Harry Potter franchise than this one. The invisibility cloak that uses time was designed by Purdue University scientists. Unlike the spatial cloak we all saw in Harry Potter, this device uses time cloaking, a relatively new concept based on the idea that in some places in time, the things that happen are not picked up. Since nobody can tell that these things occurred, it’s like they never happened. The concept still has a long way to go before it turns into reality, although scientists have been able to cloak small electrical signals so far. The technology may be difficult to grasp, yet researchers think that if successful , it will be a major breakthrough in making quantum information computing and storage very successful. Another research team, meanwhile, detailed how to make an invisibility cloak to hide large objects, including a person. The New York University of Rochester scientists used a conventional arrangement of lenses and mirrors to drive the light around the area they want to hide from view. The human-scale cloak also manages the impressive feat of hiding items across the entire optical range. But it still faces one major problem: that is only works in one direction, which means the hidden object becomes visible if the viewpoint changes. Nonetheless, this large-scale cloak could be successfully used to hide satellites in orbit and other huge objects. And a Shanghai-based team of researchers unveiled another invisibility cloak which they claim can be adjusted to make items invisible from any line of sight. The scientists demonstrated the cloak by making a pet goldfish and a cat disappear. According to the Chinese team, the device may have important applications in security, surveillance and entertainment. http://www.youtube.com/watch?v=YNO9-DYCi2U With all the new ideas and research, it seems we will see an actual invisibility cloak in use very soon. What do you think of this technology? What would you do if you had your very own invisibility cloak? [Image via Mental floss]](http://cdn.techbeat.com/wp-content/uploads/2013/06/invisibility-harry-120x80.jpg)