lzma parallelizes very well! My implementation of parallel xz ( https://github.com/vasi/pixz https://github.com/vasi/pixz ) works quite well. There are others a

lzma parallelizes very well! My implementation of parallel xz ( https://github.com/vasi/pixz https://github.com/vasi/pixz ) works quite well. There are others as well, including pxz and the alpha version of the standard xz. All these tools produce compressed files that conform to the xz format and can be decompressed by any xz utility.