From 7e7f206f90798760230a187bc3e228c66c91bd51 Mon Sep 17 00:00:00 2001
From: Pierre Martin <pierre@front-commerce.com>
Date: Mon, 8 Mar 2021 15:40:45 +0100
Subject: [PATCH] Better illustrate the purpose

---
 web/index.php         | 5 +++++
 web/slow-but-fast.php | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/web/index.php b/web/index.php
index 71f39a2..2a25efd 100644
--- a/web/index.php
+++ b/web/index.php
@@ -1,4 +1,9 @@
 <?php
+// First visit -> 5s, times match
+// Second visit -> instant, times don't match
+// … T+14 -> instant, times don't match
+// … T+15 (or 16) -> instant, times match (or almost)
+// Nothing for 30s -> 5s, times match
 header('Cache-Control: s-max-age=10, stale-while-revalidate=20');
 sleep(5);
 print('This is a slow test. ' . date('Y-m-d H:i:s'));
diff --git a/web/slow-but-fast.php b/web/slow-but-fast.php
index 027920b..d6aec80 100644
--- a/web/slow-but-fast.php
+++ b/web/slow-but-fast.php
@@ -1,5 +1,5 @@
 <?php
-header('Cache-Control: s-max-age=1, stale-while-revalidate=20');
+header('Cache-Control: s-max-age=1, stale-while-revalidate=99999999');
 sleep(5);
 print('This is a slow instant test. ' . date('Y-m-d H:i:s'));
 ?>