trees.splay: use typed.
heaps: performance improvements.
tools.completion: small performance improvements.
core-foundation.file-descriptors: inline enable-all-callbacks.
core-foundation.run-loop: CFTimeInterval is a double.
benchmark.linked-assocs: adding a linked-assocs benchmark.
linked-assocs: some performance improvements.
interval-maps: bit of unsafe.
Use -unsafe words with pair methods.