diff --git a/examples/protocol/bench/support/bench_common.rs b/examples/protocol/bench/support/bench_common.rs
index d581e42..e2a7393 100644
--- a/examples/protocol/bench/support/bench_common.rs
+++ b/examples/protocol/bench/support/bench_common.rs
@@ -72,142 +72,171 @@ pub fn run_decode_call(iterations: usize) -> usize {
 
 #[inline(never)]
 pub fn run_forward_call_receive(iterations: usize) -> usize {
-    let mut checksum = 0usize;
-    for _ in 0..iterations {
-        let mut root = ProtocolEndpoint::new(
-            Vec::new(),
-            None,
-            vec![ChildRoute::registered(path(&["edge"]))],
-            Vec::new(),
-        );
-        let hook_id = root.allocate_hook_id();
-        let frame = root
-            .make_call(
-                path(&["edge", "worker"]),
-                Some(String::from("service")),
-                String::from("example.service.v1.invoke"),
-                Some(hook_id),
-                vec![1; 32],
-            )
-            .expect("seed call should encode");
-
+    let cases = build_forward_call_cases(iterations);
+    run_cases(cases, |(mut root, frame)| {
         let outcome = root
             .receive(&Ingress::Local, frame)
             .expect("forward receive should work");
-        let forwarded = match outcome {
-            EndpointOutcome::Forward { route, frame } => route_value(route).wrapping_add(frame.len()),
+        match outcome {
+            EndpointOutcome::Forward { route, frame } => {
+                route_value(route).wrapping_add(frame.len())
+            }
             EndpointOutcome::Local(_) => 0,
             EndpointOutcome::Dropped => usize::from(true),
-        };
-        checksum = checksum.wrapping_add(forwarded);
-    }
-    black_box(checksum)
+        }
+    })
 }
 
 #[inline(never)]
 pub fn run_local_call_receive(iterations: usize) -> usize {
-    let mut checksum = 0usize;
-    for _ in 0..iterations {
-        let mut endpoint = ProtocolEndpoint::new(
-            path(&["worker"]),
-            Some(Vec::new()),
-            Vec::new(),
-            vec![LeafSpec {
-                name: String::from("service"),
-                procedures: vec![String::from("example.service.v1.invoke")],
-            }],
-        );
-        let frame = encode_packet(
-            &PacketHeader {
-                packet_type: PacketType::Call,
-                src_path: Vec::new(),
-                dst_path: path(&["worker"]),
-                dst_leaf: Some(String::from("service")),
-                hook_id: None,
-            },
-            &CallMessage {
-                procedure_id: String::from("example.service.v1.invoke"),
-                data: vec![2; 32],
-                response_hook: Some(unshell::protocol::HookTarget {
-                    hook_id: 42,
-                    return_path: Vec::new(),
-                }),
-            },
-        )
-        .expect("seed local call should encode");
-
+    let cases = build_local_call_cases(iterations);
+    run_cases(cases, |(mut endpoint, frame)| {
         let outcome = endpoint
             .receive(&Ingress::Parent, frame)
             .expect("local call should work");
         match outcome {
-            EndpointOutcome::Local(LocalEvent::Call { header, message }) => {
-                checksum = checksum
-                    .wrapping_add(header.dst_path.len())
-                    .wrapping_add(header.src_path.len())
-                    .wrapping_add(header.dst_leaf.as_ref().map_or(0, String::len))
-                    .wrapping_add(message.data.len())
-                    .wrapping_add(message.procedure_id.len());
-            }
+            EndpointOutcome::Local(LocalEvent::Call { header, message }) => header
+                .dst_path
+                .len()
+                .wrapping_add(header.src_path.len())
+                .wrapping_add(header.dst_leaf.as_ref().map_or(0, String::len))
+                .wrapping_add(message.data.len())
+                .wrapping_add(message.procedure_id.len()),
             other => panic!("expected local call event, got {other:?}"),
         }
-    }
-    black_box(checksum)
+    })
 }
 
 #[inline(never)]
 pub fn run_hook_data_receive(iterations: usize) -> usize {
-    let mut checksum = 0usize;
-    for _ in 0..iterations {
-        let mut host = ProtocolEndpoint::new(
-            Vec::new(),
-            None,
-            vec![ChildRoute::registered(path(&["worker"]))],
-            Vec::new(),
-        );
-        let hook_id = host.allocate_hook_id();
-        host.make_call(
-            path(&["worker"]),
-            None,
-            String::from("example.service.v1.invoke"),
-            Some(hook_id),
-            vec![3; 8],
-        )
-        .expect("seed active hook should encode");
-        let frame = encode_packet(
-            &PacketHeader {
-                packet_type: PacketType::Data,
-                src_path: path(&["worker"]),
-                dst_path: Vec::new(),
-                dst_leaf: None,
-                hook_id: Some(hook_id),
-            },
-            &unshell::protocol::DataMessage {
-                procedure_id: String::from("example.service.v1.invoke"),
-                data: vec![4; 16],
-                end_hook: false,
-            },
-        )
-        .expect("seed data should encode");
-
+    let cases = build_hook_data_cases(iterations);
+    run_cases(cases, |(mut host, frame)| {
         let outcome = host
             .receive(&Ingress::Child(path(&["worker"])), frame)
             .expect("hook data should work");
         match outcome {
             EndpointOutcome::Local(LocalEvent::Data {
                 header, message, ..
-            }) => {
-                checksum = checksum
-                    .wrapping_add(header.hook_id.unwrap_or_default() as usize)
-                    .wrapping_add(message.data.len())
-                    .wrapping_add(message.procedure_id.len())
-                    .wrapping_add(message.end_hook as usize);
-            }
+            }) => (header.hook_id.unwrap_or_default() as usize)
+                .wrapping_add(message.data.len())
+                .wrapping_add(message.procedure_id.len())
+                .wrapping_add(message.end_hook as usize),
             other => panic!("expected local data event, got {other:?}"),
         }
+    })
+}
+
+fn run_cases<T>(cases: Vec<T>, mut op: impl FnMut(T) -> usize) -> usize {
+    let mut checksum = 0usize;
+    for case in cases {
+        checksum = checksum.wrapping_add(op(case));
     }
     black_box(checksum)
 }
 
+fn build_forward_call_cases(
+    iterations: usize,
+) -> Vec<(ProtocolEndpoint, unshell::protocol::FrameBytes)> {
+    (0..iterations)
+        .map(|_| {
+            let mut root = ProtocolEndpoint::new(
+                Vec::new(),
+                None,
+                vec![ChildRoute::registered(path(&["edge"]))],
+                Vec::new(),
+            );
+            let hook_id = root.allocate_hook_id();
+            let frame = root
+                .make_call(
+                    path(&["edge", "worker"]),
+                    Some(String::from("service")),
+                    String::from("example.service.v1.invoke"),
+                    Some(hook_id),
+                    vec![1; 32],
+                )
+                .expect("seed call should encode");
+            (root, frame)
+        })
+        .collect()
+}
+
+fn build_local_call_cases(
+    iterations: usize,
+) -> Vec<(ProtocolEndpoint, unshell::protocol::FrameBytes)> {
+    (0..iterations)
+        .map(|_| {
+            let endpoint = ProtocolEndpoint::new(
+                path(&["worker"]),
+                Some(Vec::new()),
+                Vec::new(),
+                vec![LeafSpec {
+                    name: String::from("service"),
+                    procedures: vec![String::from("example.service.v1.invoke")],
+                }],
+            );
+            let frame = encode_packet(
+                &PacketHeader {
+                    packet_type: PacketType::Call,
+                    src_path: Vec::new(),
+                    dst_path: path(&["worker"]),
+                    dst_leaf: Some(String::from("service")),
+                    hook_id: None,
+                },
+                &CallMessage {
+                    procedure_id: String::from("example.service.v1.invoke"),
+                    data: vec![2; 32],
+                    response_hook: Some(unshell::protocol::HookTarget {
+                        hook_id: 42,
+                        return_path: Vec::new(),
+                    }),
+                },
+            )
+            .expect("seed local call should encode");
+            (endpoint, frame)
+        })
+        .collect()
+}
+
+fn build_hook_data_cases(
+    iterations: usize,
+) -> Vec<(ProtocolEndpoint, unshell::protocol::FrameBytes)> {
+    (0..iterations)
+        .map(|_| {
+            let mut host = ProtocolEndpoint::new(
+                Vec::new(),
+                None,
+                vec![ChildRoute::registered(path(&["worker"]))],
+                Vec::new(),
+            );
+            let hook_id = host.allocate_hook_id();
+            host.make_call(
+                path(&["worker"]),
+                None,
+                String::from("example.service.v1.invoke"),
+                Some(hook_id),
+                vec![3; 8],
+            )
+            .expect("seed active hook should encode");
+            let frame = encode_packet(
+                &PacketHeader {
+                    packet_type: PacketType::Data,
+                    src_path: path(&["worker"]),
+                    dst_path: Vec::new(),
+                    dst_leaf: None,
+                    hook_id: Some(hook_id),
+                },
+                &unshell::protocol::DataMessage {
+                    procedure_id: String::from("example.service.v1.invoke"),
+                    data: vec![4; 16],
+                    end_hook: false,
+                },
+            )
+            .expect("seed data should encode");
+            (host, frame)
+        })
+        .collect()
+}
+
 pub fn path(parts: &[&str]) -> Vec<String> {
     parts.iter().map(|part| String::from(*part)).collect()
 }