this post was submitted on 24 May 2024
68 points (97.2% liked)
Apple
17500 readers
162 users here now
Welcome
to the largest Apple community on Lemmy. This is the place where we talk about everything Apple, from iOS to the exciting upcoming Apple Vision Pro. Feel free to join the discussion!
Rules:
- No NSFW Content
- No Hate Speech or Personal Attacks
- No Ads / Spamming
Self promotion is only allowed in the pinned monthly thread
Communities of Interest:
Apple Hardware
Apple TV
Apple Watch
iPad
iPhone
Mac
Vintage Apple
Apple Software
iOS
iPadOS
macOS
tvOS
watchOS
Shortcuts
Xcode
Community banner courtesy of u/Antsomnia.
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
That’s not how lossless compression works. No data is lost.
For example, if you zip a folder of images, then unzip them, the pictures come out with their original sizes and structure. Zip is lossless.
Let’s use the analogy of a dish sponge.
Let’s pretend you wanted to make a dish sponge smaller. Lossy compression would make the sponge smaller by cutting off parts and throwing them away. Lossless would make it smaller by squish the sponge, and it would return to its normal shape once you stopped squishing it.
For your analogy, you can’t put more water in a sponge that is completely saturated
Trying to compress a compressed file doesn’t really work - at least not for a meaningful gain in storage size with zip, bzip, 7zip, gzip, xz, lzma…