[lammps-users] pair_style eam vs pair_style eam/opt

I was wondering what the difference between the two was? It says it's an optimized version which would give identical answers; i have tested it, and it is faster. But if it gives identical answers, but it's faster, why not just make it a deafult.

Style eam/opt is an optimized version of style eam that should give identical answers. Depending on system size and the processor you are running on, it may be 5-25% faster (for the pairwise portion of the run time).

Roger Liu

But if it gives identical answers, but it's faster, why not just make it a deafult.

B/c the code for the opt version is more opaque.

Steve