Before revision:  Specifically, ALTO achieves a geometric mean speedup of 8X over the best mode-agnostic format , while delivering a geometric mean compression ratio of more than 4X relative to the best mode-specific format .
After revision:  Specifically, ALTO achieves a geometric mean speedup of 8X over the best mode-agnostic format , while delivering a geometric mean compression ratio of more than 4X relative to the best mode-specific (compressed sparse fiber) formats .