It is correct that there is no OR-mode, nor is any planned (it is a major pain to implement performantly and correctly, and fairly niche).
Why not run plocate with every parameter internally? For example: plocate --use-OR file1 file2 file3 Would take all the arguments and internally run... plocate file1 plocate file2 plocate file3 ...and then output the results for all files at once, leading to the same behaviour as mlocate while being much faster. And even if it wasn't faster as mlocate in this case, who cares? Larsen