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Message: <blockquote data-quote="coolioWiZ" data-source="post: 756615" data-attributes="member: 40999">A Test for CompressionWhat is better <a href="http://www.winzip.com" target="_blank">WinZip</a>, <a href="http://www.rarlabs.com" target="_blank">WinRar</a> or <a href="http://www.7zip.org" target="_blank">7Zip</a>.I did a test for compression ratios and time taken by archiving the same set of files with all 3 programs and measuring the time taken to compress and compressed size. <img src="/styles/default/xenforo/smilies/default/wink.gif"  class="smilie" loading="lazy" alt=";)" title="Wink    ;)" data-shortname=";)" /> The computer used was a laptop with following specifications:Intel Centrino Duo 1.83GHz1GB DDR2 RAMThe folder used for the test:contents: several pdf documentssize: 101MBThe compression ratio was calculated as the disk space saved, ie:Compression Ratio(Space Saved) = 1 - Compressed Size / Uncompressed SizeThe higher percentage means better compressionWinZip 11.0============Test 1-------compression: optimize for maximum compressiontime to compress: 2 min 03 seccompressed size: 84.1MBcompression ratio: 16.73%Test 2-------compression: bzip formattime to compress: 38 seccompressed size: 86.1MBcompression ratio: 14.75%WinRar 3.70============Test 1-------compression: rar formatdictionary size: 4MBtime to compress: 57 seccompressed size: 85.4MBcompression ratio: 15.45%Test 2-------compression: zip formattime to compress: 12 seccompressed size: 87.5MBcompression ratio: 13.37%7Zip 4.52 beta===========Test 1-------archive format: 7z formatcompression method: LZMAdictionary size: 16MBword size: 32CPU Threads: 2/2time to compress: 42 seccompressed size: 84.8MBcompression ratio: 16.04%Test 2-------archive format: zip formatcompression method: Deflatedictionary size: 32KBword size: 32CPU Threads: 2/2time to compress: 10 seccompressed size: 87.5MBcompression ratio: 13.37%Test 3-------archive format: zip formatcompression method: bzip2dictionary size: 900KBCPU Threads: 2/2time to compress: 29 seccompressed size: 86.1MBcompression ratio: 14.75%Conclusion (for zip format) <img src="/styles/default/xenforo/smilies/default/shocked.gif"  class="smilie" loading="lazy" alt=":shocked:" title="Shocked    :shocked:" data-shortname=":shocked:" /> =============WinZip with optimization (zip format) takes 2 min 03 sec gives compression of 16.73%WinRar (zip format) takes 12 sec gives compression of 13.37%7Zip (zip format) takes 10 sec gives compression of 13.37%Comparing overall 7Zip gives better performance with time and WinZip performs better on compressing but takes too much time.<img src="/styles/default/xenforo/smilies/default/yes.gif"  class="smilie" loading="lazy" alt=":yes:" title="Yes    :yes:" data-shortname=":yes:" /> <img src="/styles/default/xenforo/smilies/default/yes.gif"  class="smilie" loading="lazy" alt=":yes:" title="Yes    :yes:" data-shortname=":yes:" /> <img src="/styles/default/xenforo/smilies/default/yes.gif"  class="smilie" loading="lazy" alt=":yes:" title="Yes    :yes:" data-shortname=":yes:" /> <img src="/styles/default/xenforo/smilies/default/yes.gif"  class="smilie" loading="lazy" alt=":yes:" title="Yes    :yes:" data-shortname=":yes:" /> I'm also putting this as a seperate thread on:Comp and Internet > News and Discussion forum <img src="/styles/default/xenforo/smilies/default/lol.gif"  class="smilie" loading="lazy" alt=":lol:" title="LOL    :lol:" data-shortname=":lol:" /></blockquote>

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