Fix build lags

dist/functions/server/server-post-build-fn.js

@@ -4,6 +4,9 @@ export default async function serverPostBuildFn(params) {
     if (!global.BUNEXT_HMR_CONTROLLERS?.[0] || !global.BUNEXT_BUNDLER_CTX_MAP) {
         return;
     }
+    const changed_set = params?.changed_pages && params.changed_pages.length > 0
+        ? new Set(params.changed_pages)
+        : undefined;
     const reload_payload = { reload: true };
     const reload_enqueue = `event: update\ndata: ${JSON.stringify(reload_payload)}\n\n`;
     for (let i = global.BUNEXT_HMR_CONTROLLERS.length - 1; i >= 0; i--) {
@@ -14,6 +17,10 @@ export default async function serverPostBuildFn(params) {
         if (!controller.target_map?.local_path) {
             continue;
         }
+        // Only touch controllers whose page actually changed.
+        if (changed_set && !changed_set.has(controller.target_map.local_path)) {
+            continue;
+        }
         if (params?.reload_all_controllers) {
             try {
                 controller.controller.enqueue(reload_enqueue);