Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx> writes: > This avoids unnecessary re-allocations and reinsertions. On webkit.git > (i.e. about 182k inserts to the name hash table), this reduces about > 100ms out of 3s user time. > > Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx> I think this is a very good idea, but I would prefer the second parameter to the "preallocate" to be "expected number of entries" and have the preallocate, which is a part of the hash API, decide how to inflate that number to adjust to the desired load factor of the hash table. We shouldn't have to adjust the caller when the internal implementation of the hash table changes. > --- > nd/read-directory-recursive-optim reduces the number of input (from > 182k to 11k on webkit) to exclude machinery that all patches in the > exclude optimization series I posted seem insignificant. So I won't > repost them for inclusion unless you think it has cleanup values. Sorry, without a pointer, it is unclear what "exclude optimization series" you are referring to. -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html