possible bug: investigate `std/crypto`'s vs old `std/hash`'s `digest()` for large streams

A while back, IIRC, @lino-levan discovered that `digest()` of the old `std/hash` sub-module was faster and consumed less memory than the current `digest()` of the current `std/crypto` for large streams. This scenario should be proactively investigated, validated and possibly fixed.

Note: Neither of us recalls the specifics or can find the convos surrounding this issue.