tests(perf): Add two very simple homepage-*.yml files

README.md

@@ -150,11 +150,35 @@ npx playwright test all-scenarios --grep @search_for_a_subway_line
 
 ## Load Tests
 
+### Full load test
+
 ```
 npm install --ignore-scripts
 npx artillery run ./integration/load_tests/all-scenarios.yml --target http://localhost:4001
 ```
 
+### Light load test / performance test
+
+```
+npm install --ignore-scripts
+npx artillery run ./integration/load_tests/homepage-light-load.yml
+```
+
+This is unlikely to stress your locally-running instance, but it will present output that includes something like
+
+```
+http.response_time.2xx:
+  min: ......................................................................... 287
+  max: ......................................................................... 558
+  mean: ........................................................................ 416.7
+  median: ...................................................................... 424.2
+  p95: ......................................................................... 507.8
+  p99: ......................................................................... 539.2
+```
+
+This can be useful for comparing homepage load times across different commits or releases.
+
+
 ## Monitoring
 
 ```

integration/load_tests/homepage-heavy-load.yml

@@ -0,0 +1,22 @@
+config:
+  target: "http://localhost:4001"
+  http:
+    timeout: 300
+    maxSockets: 500
+  phases:
+    - name: "Sustained high-load test"
+      duration: 300
+      arrivalRate: 100
+  environments:
+    green:
+      target: "http://dev-green.mbtace.com"
+    blue:
+      target: "http://dev-blue.mbtace.com"
+scenarios:
+  - name: "Stress test single page"
+    flow:
+      - loop:
+          - get:
+              url: "/"
+          - think: 1
+        count: 100

integration/load_tests/homepage-light-load.yml

@@ -0,0 +1,22 @@
+config:
+  target: "http://localhost:4001"
+  http:
+    timeout: 300
+    maxSockets: 500
+  phases:
+    - name: "Warm Up"
+      duration: 30
+      arrivalRate: 3
+    - name: "Measure page-load times"
+      duration: 60
+      arrivalRate: 3
+  environments:
+    green:
+      target: "http://dev-green.mbtace.com"
+    blue:
+      target: "http://dev-blue.mbtace.com"
+scenarios:
+  - name: "Stress test single page"
+    flow:
+      - get:
+          url: "/"