From cdc08dbb716d2a859e671988e44dce8ddf033d02 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Henrik=20H=C3=B8rl=C3=BCck=20Berg?=
 <36937807+henrikhorluck@users.noreply.github.com>
Date: Thu, 27 Jul 2023 08:09:12 +0200
Subject: [PATCH] Add back well-backed comment

- The dermination is from commit 7988cff6bd6b4863927e01c9aaad1559745a5371
- See PR https://github.com/fish-shell/fish-shell/pull/9139
---
 fish-rust/src/builtins/string.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fish-rust/src/builtins/string.rs b/fish-rust/src/builtins/string.rs
index 0583d0f7a..1ba8f6c9c 100644
--- a/fish-rust/src/builtins/string.rs
+++ b/fish-rust/src/builtins/string.rs
@@ -327,6 +327,9 @@ impl Drop for Arguments<'_, '_> {
 }
 
 impl<'args, 'iter> Arguments<'args, 'iter> {
+    /// Empirically determined.
+    /// This is probably down to some pipe buffer or some such,
+    /// but too small means we need to call `read(2)` and str2wcstring a lot.
     const STRING_CHUNK_SIZE: usize = 1024;
 
     fn new(