# HG changeset patch
# User Arseniy Alekseyev <aalekseyev@janestreet.com>
# Date 2023-05-18 16:25:18
# Node ID d1cab48354bca53bc4be6f7124ca542c960b6e04
# Parent  74d8a1b039603368ddd4ba5116e61a5228c53f8c

rust: in zstd decompression, avoid a useless vec initialization

diff --git a/rust/hg-core/src/revlog/mod.rs b/rust/hg-core/src/revlog/mod.rs
--- a/rust/hg-core/src/revlog/mod.rs
+++ b/rust/hg-core/src/revlog/mod.rs
@@ -603,7 +603,7 @@ impl<'revlog> RevlogEntry<'revlog> {
             Ok(buf)
         } else {
             let cap = self.uncompressed_len.max(0) as usize;
-            let mut buf = vec![0; cap];
+            let mut buf = Vec::with_capacity(cap);
             let len = zstd_decompress_to_buffer(self.bytes, &mut buf)
                 .map_err(|e| corrupted(e.to_string()))?;
             if len != self.uncompressed_len as usize {