diff --git a/panel-go/perf_bench_test.go b/panel-go/perf_bench_test.go
index d7eae85..c40f6b0 100644
--- a/panel-go/perf_bench_test.go
+++ b/panel-go/perf_bench_test.go
@@ -1,8 +1,10 @@
 package main
 
 // Benchmarks for round-3 item 22 (per-request full-clone cost). Not run
-// by `go test` without -bench. The seed is synthetic data at production
-// scale (~11 servers / 26 customers / 25 nodes / ~100 bindings).
+// by `go test` without -bench. The seed is synthetic data at the scale
+// fixed for this round's acceptance: 20 servers / 40 customers /
+// 40 nodes / ~160 bindings (20-agent steady-state tests use the same
+// scale).
 
 import (
 	"encoding/json"
@@ -16,14 +18,14 @@ import (
 func perfSeedData() *Data {
 	d := EmptyData()
 	d.Users = []*User{{ID: "usr_1", Username: "admin", PasswordHash: "x", Role: "owner", Status: "active", CreatedAt: NowISO()}}
-	for i := 0; i < 11; i++ {
+	for i := 0; i < 20; i++ {
 		d.Servers = append(d.Servers, &Server{
 			ID: fmt.Sprintf("srv_%d", i), Name: fmt.Sprintf("S%d", i), PublicAddress: "203.0.113.1",
 			Status: "online", LastSeenAt: StrPtr(NowISO()), PortRangeStart: 20000, PortRangeEnd: 50000,
 			Labels: []string{}, CreatedAt: NowISO(), UpdatedAt: NowISO(),
 		})
 	}
-	for i := 0; i < 26; i++ {
+	for i := 0; i < 40; i++ {
 		d.Customers = append(d.Customers, &Customer{
 			ID: fmt.Sprintf("cus_%d", i), Name: fmt.Sprintf("C%d", i), Status: "active",
 			SubscriptionToken: fmt.Sprintf("tok-%032d", i),
@@ -32,9 +34,9 @@ func perfSeedData() *Data {
 		})
 	}
 	protocols := []string{"vless-reality-vision", "shadowsocks-2022-aes128", "socks5-auth", "vless-ws", "hysteria2"}
-	for i := 0; i < 25; i++ {
+	for i := 0; i < 40; i++ {
 		node := &Node{
-			ID: fmt.Sprintf("nod_%d", i), Name: fmt.Sprintf("N%d", i), ServerID: fmt.Sprintf("srv_%d", i%11),
+			ID: fmt.Sprintf("nod_%d", i), Name: fmt.Sprintf("N%d", i), ServerID: fmt.Sprintf("srv_%d", i%20),
 			Protocol: protocols[i%len(protocols)], Topology: "direct", NetworkMode: "ipv4", Port: 23000 + i,
 			Status: "active", ResourceID: fmt.Sprintf("res_%d", i), Artifacts: map[string]json.RawMessage{},
 		}
@@ -48,7 +50,7 @@ func perfSeedData() *Data {
 		for j := 0; j < 4; j++ {
 			d.NodeClients = append(d.NodeClients, &NodeClient{
 				ID: fmt.Sprintf("nc_%d_%d", i, j), NodeID: node.ID,
-				CustomerID: fmt.Sprintf("cus_%d", (i+j)%26), Status: "active",
+				CustomerID: fmt.Sprintf("cus_%d", (i+j)%40), Status: "active",
 				CreatedAt: NowISO(), UpdatedAt: NowISO(),
 			})
 		}