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Do 7z archives compress each file individually or ... - Super User

: You can customize how these "blocks" are formed. For instance, using the 7-Zip command line , you can limit the number of files or the total size of a solid block to balance compression with access speed. Trade-offs to Consider billowours.7z

: Adding or deleting a file in a solid archive often requires decompressing and re-compressing the entire block, which is much slower than updating a non-solid archive. Do 7z archives compress each file individually or

: To extract a single "article" from the middle of a solid block, the archiver must decompress all preceding data in that block first. using the 7-Zip command line