perf: eager identity-transform fast-path + lazy-path speedups#5

d-v-b-agent wants to merge 4 commits into

refactor/simplify-indexingd-v-b-agent/zarr-python:refactor/simplify-indexingfrom

perf/eager-fast-path-and-lazy-speedupsd-v-b-agent/zarr-python:perf/eager-fast-path-and-lazy-speedupsCopy head branch name to clipboard