From 4eab275235f2d89ea48bb7b2b921ea33a8db3fa7 Mon Sep 17 00:00:00 2001
From: Adam Reichold <adam.reichold@t-online.de>
Date: Sat, 9 Oct 2021 12:12:57 +0200
Subject: [PATCH] tac: buffer stdout more coarsely than line-based following
 the GNU tac implementation.

---
 src/uu/tac/src/tac.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/uu/tac/src/tac.rs b/src/uu/tac/src/tac.rs
index 92bf1ea00..370e92230 100644
--- a/src/uu/tac/src/tac.rs
+++ b/src/uu/tac/src/tac.rs
@@ -12,7 +12,7 @@ extern crate uucore;
 
 use clap::{crate_version, App, Arg};
 use memchr::memmem;
-use std::io::{stdin, stdout, Read, Write};
+use std::io::{stdin, stdout, BufWriter, Read, Write};
 use std::{fs::read, path::Path};
 use uucore::display::Quotable;
 use uucore::InvalidEncodingHandling;
@@ -106,7 +106,7 @@ fn buffer_tac_regex(
     before: bool,
 ) -> std::io::Result<()> {
     let out = stdout();
-    let mut out = out.lock();
+    let mut out = BufWriter::new(out.lock());
 
     // The index of the line separator for the current line.
     //
@@ -173,7 +173,7 @@ fn buffer_tac_regex(
 /// `"/abc/def"`.
 fn buffer_tac(data: &[u8], before: bool, separator: &str) -> std::io::Result<()> {
     let out = stdout();
-    let mut out = out.lock();
+    let mut out = BufWriter::new(out.lock());
 
     // The number of bytes in the line separator.
     let slen = separator.as_bytes().len();