pub fn build_entity_index_parallel<T>(content: &T) -> EntityIndexExpand description
Build the entity index (expressId -> byte span) across all available cores.
Byte-identical to ifc_lite_core::build_entity_index over the same
content; a drop-in replacement wherever the index is built as a standalone
scan on native. On wasm32 it is the serial builder.
Safe to nest under an outer rayon task (it is a pure map-reduce with no locks
or channels); rayon work-steals rather than deadlocking. In practice every
caller invokes it at the top level, before the per-element geometry
par_iter, so no nesting occurs.