experimental persistent map data structure

magical 966e6a5864 oops, pass p.hash to insert		2022-01-23 05:27:21 +00:00
pmap.go	oops, pass p.hash to insert	2022-01-23 05:27:21 +00:00
pmap_test.go	use compact node arrays	2022-01-23 03:11:46 +00:00