Merge rust-bitcoin#4969: perf: optimize Vec creation in bip152 tests

22b4331 perf: optimize Vec creation in bip152 tests (Conger Rassen)

Pull request description:

  Replace `[0u8; 32].to_vec()` with `vec![0u8; 32]` to avoid unnecessary intermediate array allocation on the stack. The `vec!` macro directly allocates on the heap, eliminating the copy operation and improving both memory usage and performance.


ACKs for top commit:
  apoelstra:
    ACK 22b4331; successfully ran local tests


Tree-SHA512: db19d32643377a740a223f2058b66534a0955cff2c0c3e6013b9e31afa28f16527775d43a690dc9cfe95fd7a0a2a25b88ef89b6365f80e3d8e75aaacbdb46f67

Author: apoelstra

bitcoin/src/bip152.rs

@@ -544,7 +544,7 @@ mod test {
         for testcase in testcases {
             {
                 // test deserialization
-                let mut raw: Vec<u8> = [0u8; 32].to_vec();
+                let mut raw: Vec<u8> = vec![0u8; 32];
                 raw.extend(testcase.0.clone());
                 let btr: BlockTransactionsRequest = deserialize(&raw.to_vec()).unwrap();
                 assert_eq!(testcase.1, btr.indexes);