From 73d5c4474b9a00f81f6f47a094bbf6e8f131385a Mon Sep 17 00:00:00 2001
From: Terts Diepraam <terts.diepraam@gmail.com>
Date: Fri, 10 Mar 2023 12:12:24 +0100
Subject: [PATCH] shred: expand buffer size from 512 to 65536 to reduce write
 calls

This buffer size matches GNU
---
 src/uu/shred/src/shred.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/uu/shred/src/shred.rs b/src/uu/shred/src/shred.rs
index 75967a3dd..dad88b834 100644
--- a/src/uu/shred/src/shred.rs
+++ b/src/uu/shred/src/shred.rs
@@ -25,7 +25,8 @@ use uucore::error::{FromIo, UResult, USimpleError, UUsageError};
 use uucore::libc::S_IWUSR;
 use uucore::{format_usage, show, show_if_err, util_name};
 
-const BLOCK_SIZE: usize = 512;
+// This block size seems to match GNU (2^16 = 65536)
+const BLOCK_SIZE: usize = 1 << 16;
 const NAME_CHARSET: &[u8] = b"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_.";
 
 // Patterns as shown in the GNU coreutils shred implementation