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Date: Wed, 20 Dec 2023 09:20:23 -0800
To: Dan Shelton <dan.f.shelton@gmail.com>
Cc: cygwin@cygwin.com
Subject: Re: Catastrophic Cygwin find . -ls, grep performance on samba share
 compared to WSL&Linux
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From: Kaz Kylheku via Cygwin <cygwin@cygwin.com>
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On 2023-12-17 22:22, Dan Shelton via Cygwin wrote:
> It would be nice if someone from the Cygwin authors could assist me in
> figuring out why this happens.

Cygwin is famously slow; this is nothing new. We are grateful
for Cygwin because it makes stuff work at all; if it were blazing
fast that would be a bonus.

E.g. git operations (clone, rebase, ...); ./configure scripts; ...: all
run like molasses.

The following is just my fast and loose opinion, shot from the hip,
and possibly off or wrong, but it likely has to do with the layering.
Cygwin's core API is based on a C library called Newlib. Cygwin bolts
Newlib to Windows by means of an additional shim below Newlib that
is based on C++ objects, where there is path munging going on and such,
and that's where the Win32 calls get made. It's an additional abstraction.

I worked with the internals a bit when producing the Cygnal
project.

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