1 files changed, 7 insertions, 2 deletions
diff --git a/source/ui/DebugMenu.mc b/source/ui/DebugMenu.mc
index f1ab407..452cb1d 100644
--- a/source/ui/DebugMenu.mc
+++ b/source/ui/DebugMenu.mc
@@ -40,6 +40,8 @@ module DebugMenu {
         }
     }
 
+    const BENCH_HEADERS = 20;
+
     // The running benchmark (kept so its timer isn't collected).
     var bench as BenchRunner? = null;
 
@@ -74,12 +76,15 @@ module DebugMenu {
             } else if (_step == 2) {
                 _lines.add("PIN derivation: " + Kdf.calibrate(1000, Kdf.ITERATIONS_PER_STEP) + " iterations per second");
             } else if (_step == 3) {
+                // At most BENCH_HEADERS: all 110 of the UI test's entries in
+                // one event tripped the watchdog.
                 var vault = AppState.theVault();
                 var ids = vault.ids();
-                for (var i = 0; i < ids.size(); i++) {
+                var n = ids.size() < BENCH_HEADERS ? ids.size() : BENCH_HEADERS;
+                for (var i = 0; i < n; i++) {
                     vault.header(ids[i]);
                 }
-                _lines.add("Headers: " + ids.size() + " in " + (System.getTimer() - t) + " ms");
+                _lines.add("Headers: " + n + " in " + (System.getTimer() - t) + " ms");
             } else if (_step == 4) {
                 SelfTest.run();
                 _lines.add("Self-test: " + (System.getTimer() - t) + " ms");