Ensure fast flush of HTTP headers and HTML head (#2045)

* Ensure fast flush of HTTP headers and HTML head

The fast flush optimisation done in
https://github.com/FreshRSS/FreshRSS/pull/1133 does not seem to work
anymore (need to check if it is related to a PHP version).
Work-around when PHP flush() is not working
Can be tested by adding a `sleep(5);` after:

https://github.com/FreshRSS/FreshRSS/blob/ee902ee7c4370421802768c3105ba269a4f97b16/app/layout/layout.phtml#L27
Follow-up of the performance checks of
https://github.com/FreshRSS/FreshRSS/pull/2040

* output_buffering in .user.ini for PHP CGI / FPM

* Reuse .user.ini for Docker PHP config

* Longer flush

Flush a bit later, to be compatible with the default value of 4096 for
PHP output_buffering, and thus avoid the need of tuning the value.

1 files changed, 16 insertions, 10 deletions

diff --git a/app/Controllers/indexController.php b/app/Controllers/indexController.php
index 8b905c881..fa914ef87 100755
--- a/app/Controllers/indexController.php
+++ b/app/Controllers/indexController.php
@@ -32,7 +32,16 @@ class FreshRSS_index_Controller extends Minz_ActionController {
 			Minz_Error::error(404);
 		}
 
-		$this->view->callbackBeforeContent = function ($view) {
+		$this->view->categories = FreshRSS_Context::$categories;
+
+		$this->view->rss_title = FreshRSS_Context::$name . ' | ' . Minz_View::title();
+		$title = FreshRSS_Context::$name;
+		if (FreshRSS_Context::$get_unread > 0) {
+			$title = '(' . FreshRSS_Context::$get_unread . ') ' . $title;
+		}
+		Minz_View::prependTitle($title . ' · ');
+
+		$this->view->callbackBeforeFeeds = function ($view) {
 			try {
 				$tagDAO = FreshRSS_Factory::createTagDao();
 				$view->tags = $tagDAO->listTags(true);
@@ -40,7 +49,13 @@ class FreshRSS_index_Controller extends Minz_ActionController {
 				foreach ($view->tags as $tag) {
 					$view->nbUnreadTags += $tag->nbUnread();
 				}
+			} catch (Exception $e) {
+				Minz_Log::notice($e->getMessage());
+			}
+		};
 
+		$this->view->callbackBeforeEntries = function ($view) {
+			try {
 				FreshRSS_Context::$number++;	//+1 for pagination
 				$entries = FreshRSS_index_Controller::listEntriesByContext();
 				FreshRSS_Context::$number--;
@@ -67,15 +82,6 @@ class FreshRSS_index_Controller extends Minz_ActionController {
 				Minz_Log::notice($e->getMessage());
 				Minz_Error::error(404);
 			}
-
-			$view->categories = FreshRSS_Context::$categories;
-
-			$view->rss_title = FreshRSS_Context::$name . ' | ' . Minz_View::title();
-			$title = FreshRSS_Context::$name;
-			if (FreshRSS_Context::$get_unread > 0) {
-				$title = '(' . FreshRSS_Context::$get_unread . ') ' . $title;
-			}
-			Minz_View::prependTitle($title . ' · ');
 		};
 	}