Extracting several files from .tar.gzip without unpacking all archive
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libarchive implements this by using "seek-through-archive" technique (the read and unpacked tar headers are used to jump directly to the next file, avoiding all intermediate read operations allowing to build .tar.gz archive index relatively fast).
For vice versa see https://sourceforge.net/p/sevenzip/support-requests/81/