Constant merkletree::store::SMALL_TREE_BUILD

pub const SMALL_TREE_BUILD: usize = 1024;

Tree size (number of nodes) used as threshold to decide which build algorithm to use. Small trees (below this value) use the old build algorithm, optimized for speed rather than memory, allocating as much as needed to allow multiple threads to work concurrently without interrupting each other. Large trees (above) use the new build algorithm, optimized for memory rather than speed, allocating as less as possible with multiple threads competing to get the write lock.