diff --git a/.gitea/workflows/backend-quality-gate.yml b/.gitea/workflows/backend-quality-gate.yml
index 089a64c4..6e6391aa 100644
--- a/.gitea/workflows/backend-quality-gate.yml
+++ b/.gitea/workflows/backend-quality-gate.yml
@@ -166,6 +166,7 @@ jobs:
             DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
               "${packages[@]}"
           fi
+          echo "runner: $(nproc) CPUs, $(awk '/MemTotal/ {printf "%.1f", $2 / 1048576}' /proc/meminfo) GiB RAM"
           python3 --version
           curl --version
           git --version
@@ -324,6 +325,7 @@ jobs:
             DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
               "${packages[@]}"
           fi
+          echo "runner: $(nproc) CPUs, $(awk '/MemTotal/ {printf "%.1f", $2 / 1048576}' /proc/meminfo) GiB RAM"
           python3 --version
           curl --version
           git --version
@@ -472,6 +474,33 @@ jobs:
           export PATH="$PWD/.venv/bin:$PATH"
           npm test --prefix frontend
 
+      - name: Report slowest frontend tests
+        if: always()
+        run: |
+          set -euo pipefail
+          # Timing evidence for CI tuning: the 25 slowest top-level tests and
+          # the sum of all top-level test time (tests run concurrently, so the
+          # sum is larger than the step's wall time).
+          tap=gate-logs/frontend-tests.tap
+          [ -f "$tap" ] || { echo "no $tap"; exit 0; }
+          python3 - "$tap" <<'PY'
+          import re, sys
+          rows, name = [], None
+          for line in open(sys.argv[1], encoding="utf-8", errors="replace"):
+              head = re.match(r"^(?:not )?ok \d+ - (.*)$", line)
+              if head:
+                  name = head.group(1)
+                  continue
+              took = re.match(r"^  duration_ms: ([0-9.]+)$", line)
+              if took and name is not None:
+                  rows.append((float(took.group(1)), name))
+                  name = None
+          rows.sort(reverse=True)
+          print(f"top-level tests={len(rows)} summed={sum(r[0] for r in rows) / 1000:.0f}s")
+          for ms, test in rows[:25]:
+              print(f"{ms / 1000:8.1f}s  {test[:150]}")
+          PY
+
       - name: Frontend lint
         run: |
           set -euo pipefail