diff --git a/performances/src/trackNetwork.ts b/performances/src/trackNetwork.ts
index 4a66786fad..5b6a7ebdfb 100644
--- a/performances/src/trackNetwork.ts
+++ b/performances/src/trackNetwork.ts
@@ -1,5 +1,7 @@
 import type { HTTPRequest, Page } from 'puppeteer'
 
+// Arbitrary maximum time to wait for a request, to make sure `waitForNetworkIdle` does not block
+// for too long.
 const REQUEST_TIMEOUT = 5000 // 5 seconds
 
 export function trackNetwork(page: Page) {