/g/ -What is the point of Compressing Files?

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File: c397422849546b6⋯.jpg (40.2 KB,431x598,431:598,house_vagina_zipper_house_….jpg)

What is the point of Compressing Files? Anonymous 03/09/20 (Mon) 13:49:47 No.12515

Yea, um, hi.

I'm wondering if I've been doing something wrong because there doesn't seem to be any point in archiving and compressing files.

The Test Results:

Test 1

> Collective size of original files before archiving: 2,934 Kb

> Number of files: 4 ( 2 x .jpg | 1 x .png | 1 x .gif )

tar.bz2 = 2,933 Kb -0.03 %

tar.gz = 2,926 Kb -0.27 %

tar.xz = 2,888 Kb -1.56 %

Test 2

> Size of file: 113,036 Kb (.mp4)

tar.bz2 = 112,517 Kb -0.45 %

tar.gz = 112,206 Kb -0.73 %

tar.xz = 111,964 Kb -0.94 %

Test 3

> Collective size of original files before archiving: 579.4 Mb

> Number of files: 581 (Mostly pictures but also some videos)

tar.bz2 = 574.4 Mb -0.86 %

tar.gz = 572.2 Mb -1.24 %

tar.xz = 570.5 Mb -1.53 %

(Note: The .xz format reduced the file size the most but took significantly longer.)

So is there any reason to compress files, besides wasting time?

Or am I doing it wrong?

____________________________

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Anonymous 03/09/20 (Mon) 21:45:31 No.12518

Yes. Why are you tar'ing and compressing single files?

On a multi-file basis, you will get much better results, and also have it in one file, so it can be uploaded online, or passed through programs such as scp.

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Anonymous 03/10/20 (Tue) 01:24:05 No.12524

>compressing compressed formats

nigger logic

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Anonymous 03/10/20 (Tue) 02:38:30 No.12525

>>12524

This. OP is a nigger. So is this nigger that completely misdiagnosed the problem: >>12518. Get off my board, you useless fucking niggers.

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Anonymous 03/10/20 (Tue) 03:11:24 No.12526

>>12515

jpg, png, gif, and mp4 are already compressed. compressing them again won't make them much smaller, and might make them bigger. without compression, those files could be several megabytes instead of a few hundred kilobytes (kilobytes are much smaller than megabytes).

compressed archives are best for large amounts of text files that aren't going be used for a long time or ever. think old code, old log files, old financial documents, old exported emails, etc

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Anonymous 03/10/20 (Tue) 04:19:12 No.12527

File: 7e9edc2f9cccb74⋯.png (125.24 KB,1022x376,511:188,compression.png)

>>12526

Your correct.

Original file (Pure UTF-8 text): 107,7 Kb

> -z for gzip (.tar.gz) = 35.9 Kb –66%

> -j for bzip2 (.tar.bz2''') = 30.4 Kb –71%

> -J for xz (.tar.xz''') = 32.4 Kb –69%

Isn't it strange though, why websites recommend that you compress your video's. This is the first site that Google shows when searching for "compressing files". https://www.winzip.com/win/en/learn/file-compression.html

> pic related

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Anonymous 03/10/20 (Tue) 21:49:13 No.12531

>>12527

You should compress your videos because lossless videos are comedically large in size. Putting compressed videos in a zip file is a top tier placebo strategy for retards

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Anonymous 03/11/20 (Wed) 01:03:52 No.12533

Compression algorithms only really work on text files. Image and Videos already use their own compression and container systems; theres not much benefit to doubling up.

* Make text files smaller

* Make one file from many file (some times good from uploads and downloads)

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Anonymous 03/11/20 (Wed) 19:21:50 No.12542

>>12515

Compression is useful for people with data caps.

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Anonymous 03/11/20 (Wed) 19:47:11 No.12543

>>12515

Compressing isn't for compressed files. Unless you want them available as a single file to be uploaded somewhere.

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Anonymous 03/14/20 (Sat) 19:00:36 No.12616

>>12515

Those pictures and videos are already compressed so putting them in an archive will only give you marginally better compression.

So there is no point in putting them in an archive besides easier distribution.

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Anonymous 03/14/20 (Sat) 19:01:30 No.12617

>>12543

accidently just wrote what you wrote because I didn't scroll down

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Anonymous 03/14/20 (Sat) 19:03:33 No.12618

>>12531

by reencoding them, not by zipping them

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