From 88da5f1a4b1def6a24bc8df86003462f7290eae1 Mon Sep 17 00:00:00 2001
From: Michael Maletich <michael.maletich@relativity.com>
Date: Wed, 27 Nov 2024 07:29:48 -0600
Subject: [PATCH] Avoid copying

---
 arrow-ipc/src/writer.rs | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/arrow-ipc/src/writer.rs b/arrow-ipc/src/writer.rs
index a7ea2225323..9649851f279 100644
--- a/arrow-ipc/src/writer.rs
+++ b/arrow-ipc/src/writer.rs
@@ -1429,8 +1429,14 @@ fn reencode_offsets<O: OffsetSizeTrait>(
     let start_offset = offset_slice.first().unwrap();
     let end_offset = offset_slice.last().unwrap();
 
-    let offsets: Buffer = match start_offset.as_usize() {
-        0 => Buffer::from_slice_ref(offset_slice),
+    let offsets = match start_offset.as_usize() {
+        0 => {
+            let size = size_of::<O>();
+            offsets.slice_with_length(
+                data.offset() * size,
+                (data.offset() + data.len() + 1) * size,
+            )
+        }
         _ => offset_slice.iter().map(|x| *x - *start_offset).collect(),
     };