[Fred]

Je pensais aux archives non solides, effectivement. Dans le cas des archives solides, l'index est toujours mis à jour, c'est plutôt lourd mais ça peut donner quelques algos intéressants puisqu'on doit toujours compresser un flux de données, l'ordre n'a que peu d'importance. Après, tout dépend de l'algo de compression et en particulier de la génération des dictionnaires ...

[Cougar]

Bon j'ai fait quelques tests avec mon modeste PIV 3.08 Ghz HT mode de compression BEST (pas solid ni autre)

dossier de 170 567 ko de png :
winrar 3.5 : 2'39 163 413 ko
winrar 3.6 : 2'16 163 411 ko

dossier de 111 698 ko de ficher "texte"
winrar 3.5 : 2'12 65 662 ko
winrar 3.6 : 1'40 65 652 ko

le gain de temps est donc loin d'être négligeable et on note même un faible gain au niveau de la taille

je ferai le test sur un fichier unique, genre de 700mo.

[Matt]

Originally Posted by Cougar

Bon j'ai fait quelques tests avec mon modeste PIV 3.08 Ghz HT mode de compression BEST (pas solid ni autre)

Dis donc, il est pas à 2.8 officiellement ton P4 ?

Originally Posted by Cougar

le gain de temps est donc loin d'être négligeable et on note même un faible gain au niveau de la taille

Tu devrais aussi faire un test en vérouillant WinRAR 3.6 sur un seul des core virtuels, pour voir si le gain de temps est vraiment entièrement du au multithreading, ou s'il est aussi dû à d'autres améliorations de l'algorithme.

EDIT : bon ben j'ai fait un essai rapide, et en activant l'option solide. La charge CPU tourne à 88-89% en moyenne, avec des pointes à 95%. Donc il y a vraiment eu un très bon travail d'optimisation, et pas simplement une mise en parallèle de la compression de deux fichiers.

[Cougar]

2'16 exactement pour le deuxième dossier multithreading off, donc y a apparamment un réel gain
A noter que l'archive fait 65 659 ko, comprendra qui pourra !

[LeMoi]

Version 3.60 beta 6
 
1. Switch -ad did not work in GUI winrar.exe.
2. When repairing several archives, console RAR did not handle 'No' choice of overwrite archive request properly. It aborted the operation instead of skipping the current archive.

Télécharger WinRAR 3.60 Beta 6 (Anglais, évaluation)

[LeMoi]

WinRAR 3.60
 
1. Multithreaded version of RAR compression algorithm improves
the compression speed on computers with several CPU,
dual core CPU and processors with hyperthreading technology.
Multithreading is enabled by default, but you can disable it
in "General" part of "Settings" dialog.

In the command line mode you can control multithreading with
-mt switch.

2. WinRAR can display the folder tree panel allowing to navigate
in disk and archive folders. Use "Options/Folder tree" submenu
to enable the folder tree. It can be configured separately
in file and archive management modes.

Folder tree replaces "Browse for folder" command previously
available in "File" menu and uses its Ctrl+T keyboard shortcut.

3. Now WinRAR "Rename" command also works with ZIP archives.
Previous versions could rename files only in RAR archives.

4. Added decompression of LZH archives created with "-lh7-" algorithm.

5. New "Remove duplicate folders from extraction path" option
in "Settings/Compression" dialog.

If this option is on and you unpack an archive which root folder
has no files and only one 'somename' folder and if destination
folder is new or empty and also ends with '/somename', WinRAR
will exclude one 'somename' from resulting 'somename/somename' path.

6. New "Define volume sizes..." button in "Settings/Compression".
This button activates "Define volume sizes" dialog. Here you
can customize the list of predefined volume sizes associated
with "Split to volumes, bytes" field in archiving dialog.

7. Speed of RAR general compression increased for some data types.
Depending on data type and size the gain may achieve 5 - 15%.

8. New "Rename automatically" option in the extraction dialog
and command line -or switch to rename extracted files automatically
if file with the same name already exists. You can also enable
the auto-renaming mode directly from the overwrite confirmation
prompt with "Rename All" button.

Renamed files will get names like 'filename(N).txt',
where 'filename.txt' is the original file name and 'N' is a number.

9. "Set modification time" option in "Advanced" part of extraction
dialog is accessible also for ZIP archives. Previously it could be
changed only for RAR archives.

10. "Multithreading" option added to "Benchmark and hardware test"
command, so you can compare performance of usual and multithreaded
versions of RAR compression algorithm.

11. New 'ch' (change archive parameters) command line mode command.
Its purpose is to apply switches like -av, -tl and -cl to archive.

12. New 'cv' command line mode command. It provides the command line
interface to WinRAR "Convert archives" command. It is supported
only by winrar.exe, not by rar.exe.

13. New command line -sl and -sm switches to set size
limits of processing files.

14. New command line -fcu[file] switch allows to read archive
comments from Unicode files. It also modifies behavior
of "cw" command, setting the comment output format to Unicode.

15. 7Z added to list of formats stored without compression
when using -ms switch without a parameter.

16. Switch -e[+] is now supported by most of command line
operations including extracting and deleting files. Previously
it was supported by only archiving command.

17. It is allowed to use environment variables in archive name
in archiving dialog, in destination path in extraction dialog,
in folder names on "Compression" and "Paths" pages in WinRAR
settings. For example, you can enter '%temp%' in "Folder for
temporary files" field.

Page de téléchargement

[mustang89]

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