w32-pipe-read-delay (was: vc-dir operation is very slow on large git repositories in Emacs 26.1)

[Stefan Monnier]

BTW, it seems that w32-pipe-read-delay aims to solve a similar issue as
process-adaptive-read-buffering.

Does process-adaptive-read-buffering currently apply to w32 subprocesses?
If so, could it be that w32-pipe-read-delay was made obsolete when
process-adaptive-read-buffering was added?  If not, why not
(i.e. what's the fundamental difference between the two)?


        Stefan