The reason why people use 7zip isn't that it's quick. It's because it is cost-effective. At its fastest level, WinRAR, 7Z, and LZMA2 is over 2x quicker than ZIP Deflate and slightly faster than RAR PPMd, reversing RAR PPMd's performance advantage in compression speed tests. With the quickest setting, you'll get a file in no time. However, it will be 99.9% the size of the original file.