Do not persist HttpServerProperties to disk that often.

net/http/http_server_properties_impl.cc

Index: net/http/http_server_properties_impl.cc
diff --git a/net/http/http_server_properties_impl.cc b/net/http/http_server_properties_impl.cc
index 9e6e92e719d66a5dbf7711e29367b468b0117b20..6f0c1ea1f8ba1e73bbfb0958610e471bf6e80fbe 100644
--- a/net/http/http_server_properties_impl.cc
+++ b/net/http/http_server_properties_impl.cc
@@ -413,8 +413,18 @@ bool HttpServerPropertiesImpl::SetAlternativeServices(
   if (it != alternative_service_map_.end()) {
     DCHECK(!it->second.empty());
     if (it->second.size() == alternative_service_info_vector.size()) {
-      changed = !std::equal(it->second.begin(), it->second.end(),
-                            alternative_service_info_vector.begin());
+      changed = false;
+      auto new_it = alternative_service_info_vector.begin();
+      for (const auto& old : it->second) {
+        // Persist to disk immediately if new entry has different scheme, host,
+        // or port, or if it expires sooner.
+        if (old.alternative_service != new_it->alternative_service ||
+            old.expiration > new_it->expiration) {
+          changed = true;
+          break;
+        }
+        ++new_it;
+      }
     }
   }