For the fastest extraction, use the official 7-Zip client . Right-click the file and select Extract Files... to choose a specific destination.

Extracting large 7z archives ("long features") can sometimes take hours if they contain millions of small files.

7z a -mx=9 -mfb=273 -ms=on fagroup.7z -mx=9 : Sets level to "Ultra". -mfb=273 : Maximum number of fast bytes for LZMA.