diff --git a/crates/udp_load_test/src/common.rs b/crates/udp_load_test/src/common.rs
index 6f40729..ade23ac 100644
--- a/crates/udp_load_test/src/common.rs
+++ b/crates/udp_load_test/src/common.rs
@@ -27,7 +27,7 @@ pub struct Statistics {
 
 #[derive(Clone)]
 pub struct LoadTestState {
-    pub info_hashes: Arc<Vec<InfoHash>>,
+    pub info_hashes: Arc<[InfoHash]>,
     pub statistics: Arc<Statistics>,
 }
 
diff --git a/crates/udp_load_test/src/lib.rs b/crates/udp_load_test/src/lib.rs
index d040c41..0ce9a51 100644
--- a/crates/udp_load_test/src/lib.rs
+++ b/crates/udp_load_test/src/lib.rs
@@ -46,7 +46,7 @@ pub fn run(config: Config) -> ::anyhow::Result<()> {
     }
 
     let state = LoadTestState {
-        info_hashes: Arc::new(info_hashes),
+        info_hashes: Arc::from(info_hashes.into_boxed_slice()),
         statistics: Arc::new(Statistics::default()),
     };
 
diff --git a/crates/udp_load_test/src/worker/request_gen.rs b/crates/udp_load_test/src/worker/request_gen.rs
index 60a6798..1f311f3 100644
--- a/crates/udp_load_test/src/worker/request_gen.rs
+++ b/crates/udp_load_test/src/worker/request_gen.rs
@@ -13,7 +13,7 @@ use crate::utils::*;
 pub fn process_response(
     rng: &mut impl Rng,
     gamma: Gamma<f64>,
-    info_hashes: &Arc<Vec<InfoHash>>,
+    info_hashes: &Arc<[InfoHash]>,
     config: &Config,
     torrent_peers: &mut TorrentPeerMap,
     response: Response,
@@ -89,7 +89,7 @@ pub fn process_response(
 fn if_torrent_peer_move_and_create_random_request(
     config: &Config,
     rng: &mut impl Rng,
-    info_hashes: &Arc<Vec<InfoHash>>,
+    info_hashes: &Arc<[InfoHash]>,
     torrent_peers: &mut TorrentPeerMap,
     transaction_id: TransactionId,
 ) -> Option<Request> {
@@ -110,7 +110,7 @@ fn if_torrent_peer_move_and_create_random_request(
 fn create_random_request(
     config: &Config,
     rng: &mut impl Rng,
-    info_hashes: &Arc<Vec<InfoHash>>,
+    info_hashes: &Arc<[InfoHash]>,
     transaction_id: TransactionId,
     torrent_peer: &TorrentPeer,
 ) -> Request {
@@ -168,7 +168,7 @@ fn create_announce_request(
 }
 
 fn create_scrape_request(
-    info_hashes: &Arc<Vec<InfoHash>>,
+    info_hashes: &Arc<[InfoHash]>,
     torrent_peer: &TorrentPeer,
     transaction_id: TransactionId,
 ) -> Request {
@@ -192,7 +192,7 @@ fn create_torrent_peer(
     config: &Config,
     rng: &mut impl Rng,
     gamma: Gamma<f64>,
-    info_hashes: &Arc<Vec<InfoHash>>,
+    info_hashes: &Arc<[InfoHash]>,
     connection_id: ConnectionId,
 ) -> TorrentPeer {
     let num_scape_hashes = rng.gen_range(1..config.requests.scrape_max_torrents);