* compiler: add -show-instructions to report retired instructions per stage
-show-timings only prints wall time, which is noisy on a loaded machine.
-show-instructions implies -show-timings and appends the retired CPU
instructions of each stage (summed over all threads) and of the whole
process, read from proc_pid_rusage on macOS.
* transform: cache bare struct candidates and use interned names for registry lookups
Receiver method resolution scanned every checker struct for each bare
type name. Build a short-name -> qualified-struct index once per struct
registry and invalidate it when generic templates are erased.
Generic name checks rebuilt name-id indexes of the enum and transform
registries whenever they grew; look the interned name up in the
registry map directly instead.
* markused: build interface dispatch keys once per scan
The used-interface dispatch pass rebuilt every implementer method key
on each worklist round. Precompute the groups and keys once, skip the
pass when no new functions were marked, and enqueue IError keys once.
Alexander Medvednikov
064d83671c