It is hard to understand where the speedup comes. What is the difference between "manner 1" and "manner 2”?
Btw, we don’t provide “ELL” format in PETSc. We provide “SELL”, which should be more SIMD-friendly than the column-ELL proposed in the paper. Hong On Oct 10, 2019, at 8:16 PM, Matthew Knepley via petsc-dev <petsc-dev@mcs.anl.gov<mailto:petsc-dev@mcs.anl.gov>> wrote: Thanks, Matt -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener https://www.cse.buffalo.edu/~knepley/<http://www.cse.buffalo.edu/~knepley/> <08560093.pdf>
