diff --git a/blocks/site_main_menu/block_site_main_menu.php b/blocks/site_main_menu/block_site_main_menu.php
index 5d2c515bbc0..38c2db3d9d5 100644
--- a/blocks/site_main_menu/block_site_main_menu.php
+++ b/blocks/site_main_menu/block_site_main_menu.php
@@ -29,10 +29,10 @@ class block_site_main_menu extends block_list {
         require_once($CFG->dirroot.'/course/lib.php');
         $context = context_course::instance($course->id);
         $isediting = $this->page->user_is_editing() && has_capability('moodle/course:manageactivities', $context);
-        $modinfo = get_fast_modinfo($course);
 
 /// extra fast view mode
         if (!$isediting) {
+            $modinfo = get_fast_modinfo($course);
             if (!empty($modinfo->sections[0])) {
                 $options = array('overflowdiv'=>true);
                 foreach($modinfo->sections[0] as $cmid) {
@@ -62,7 +62,7 @@ class block_site_main_menu extends block_list {
 /// slow & hacky editing mode
         $ismoving = ismoving($course->id);
         $section  = get_course_section(0, $course->id);
-
+        $modinfo = get_fast_modinfo($course);
         get_all_mods($course->id, $mods, $modnames, $modnamesplural, $modnamesused);
 
         $groupbuttons = $course->groupmode;
@@ -82,14 +82,13 @@ class block_site_main_menu extends block_list {
             $this->content->items[] = $USER->activitycopyname.'&nbsp;(<a href="'.$CFG->wwwroot.'/course/mod.php?cancelcopy=true&amp;sesskey='.sesskey().'">'.$strcancel.'</a>)';
         }
 
-        if (!empty($section->sequence)) {
-            $sectionmods = explode(',', $section->sequence);
+        if (!empty($modinfo->sections[0])) {
             $options = array('overflowdiv'=>true);
-            foreach ($sectionmods as $modnumber) {
-                if (empty($mods[$modnumber])) {
+            foreach ($modinfo->sections[0] as $modnumber) {
+                $mod = $modinfo->cms[$modnumber];
+                if (!$mod->uservisible) {
                     continue;
                 }
-                $mod = $mods[$modnumber];
                 if (!$ismoving) {
                     if ($groupbuttons) {
                         if (! $mod->groupmodelink = $groupbuttonslink) {
diff --git a/blocks/social_activities/block_social_activities.php b/blocks/social_activities/block_social_activities.php
index d9f98b01107..f87ae7fb5e0 100644
--- a/blocks/social_activities/block_social_activities.php
+++ b/blocks/social_activities/block_social_activities.php
@@ -64,11 +64,8 @@ class block_social_activities extends block_list {
 
 /// slow & hacky editing mode
         $ismoving = ismoving($course->id);
-        $sections = get_all_sections($course->id);
-
-        if(!empty($sections) && isset($sections[0])) {
-            $section = $sections[0];
-        }
+        $modinfo = get_fast_modinfo($course);
+        $section = $modinfo->get_section_info(0);
 
         if (!empty($section)) {
             get_all_mods($course->id, $mods, $modnames, $modnamesplural, $modnamesused);
@@ -91,14 +88,13 @@ class block_social_activities extends block_list {
             $this->content->items[] = $USER->activitycopyname.'&nbsp;(<a href="'.$CFG->wwwroot.'/course/mod.php?cancelcopy=true&amp;sesskey='.sesskey().'">'.$strcancel.'</a>)';
         }
 
-        if (!empty($section) && !empty($section->sequence)) {
-            $sectionmods = explode(',', $section->sequence);
+        if (!empty($modinfo->sections[0])) {
             $options = array('overflowdiv'=>true);
-            foreach ($sectionmods as $modnumber) {
-                if (empty($mods[$modnumber])) {
+            foreach ($modinfo->sections[0] as $modnumber) {
+                $mod = $modinfo->cms[$modnumber];
+                if (!$mod->uservisible) {
                     continue;
                 }
-                $mod = $mods[$modnumber];
                 if (!$ismoving) {
                     if ($groupbuttons) {
                         if (! $mod->groupmodelink = $groupbuttonslink) {
diff --git a/course/externallib.php b/course/externallib.php
index 22e2e4ef9f0..c2a5c94e709 100644
--- a/course/externallib.php
+++ b/course/externallib.php
@@ -105,13 +105,12 @@ class core_course_external extends external_api {
 
             //retrieve sections
             $modinfo = get_fast_modinfo($course);
-            $sections = get_all_sections($course->id);
+            $sections = $modinfo->get_section_info_all();
 
             //for each sections (first displayed to last displayed)
             foreach ($sections as $key => $section) {
 
-                $showsection = (has_capability('moodle/course:viewhiddensections', $context) or $section->visible or !$course->hiddensections);
-                if (!$showsection) {
+                if (!$section->uservisible) {
                     continue;
                 }
 
diff --git a/course/recent.php b/course/recent.php
index 71c83f52568..a7deb367dde 100644
--- a/course/recent.php
+++ b/course/recent.php
@@ -91,11 +91,9 @@ if (has_capability('moodle/course:viewhiddensections', $context)) {
     $hiddenfilter = "AND cs.visible = 1";
 }
 $sections = array();
-$rawsections = array_slice(get_all_sections($course->id), 0, $course->numsections+1, true);
-$canviewhidden = has_capability('moodle/course:viewhiddensections', $context);
-foreach ($rawsections as $section) {
-    if ($canviewhidden || !empty($section->visible)) {
-        $sections[$section->section] = $section;
+foreach ($modinfo->get_section_info_all() as $i => $section) {
+    if (!empty($section->uservisible)) {
+        $sections[$i] = $section;
     }
 }
 
@@ -115,20 +113,18 @@ if ($param->modid === 'all') {
     }
 
 } else if (is_numeric($param->modid)) {
-    $section = $sections[$modinfo->cms[$param->modid]->sectionnum];
-    $section->sequence = $param->modid;
-    $sections = array($section->sequence=>$section);
+    $sectionnum = $modinfo->cms[$param->modid]->sectionnum;
+    $filter_modid = $param->modid;
+    $sections = array($sectionnum => $sections[$sectionnum]);
 }
 
 
-if (is_null($modinfo->groups)) {
-    $modinfo->groups = groups_get_user_groups($course->id); // load all my groups and cache it in modinfo
-}
+$modinfo->get_groups(); // load all my groups and cache it in modinfo
 
 $activities = array();
 $index = 0;
 
-foreach ($sections as $section) {
+foreach ($sections as $sectionnum => $section) {
 
     $activity = new stdClass();
     $activity->type = 'section';
@@ -141,17 +137,11 @@ foreach ($sections as $section) {
     $activity->visible = $section->visible;
     $activities[$index++] = $activity;
 
-    if (empty($section->sequence)) {
+    if (empty($modinfo->sections[$sectionnum])) {
         continue;
     }
 
-    $sectionmods = explode(",", $section->sequence);
-
-    foreach ($sectionmods as $cmid) {
-        if (!isset($mods[$cmid]) or !isset($modinfo->cms[$cmid])) {
-            continue;
-        }
-
+    foreach($modinfo->sections[$sectionnum] as $cmid) {
         $cm = $modinfo->cms[$cmid];
 
         if (!$cm->uservisible) {
@@ -162,6 +152,10 @@ foreach ($sections as $section) {
             continue;
         }
 
+        if (!empty($filter_modid) and $cmid != $filter_modid) {
+            continue;
+        }
+
         $libfile = "$CFG->dirroot/mod/$cm->modname/lib.php";
 
         if (file_exists($libfile)) {
diff --git a/course/recent_form.php b/course/recent_form.php
index 46a31374242..349fd58a8f2 100644
--- a/course/recent_form.php
+++ b/course/recent_form.php
@@ -36,7 +36,6 @@ class recent_form extends moodleform {
         $mform =& $this->_form;
         $context = context_course::instance($COURSE->id);
         $modinfo = get_fast_modinfo($COURSE);
-        $sections = get_all_sections($COURSE->id);
 
         $mform->addElement('header', 'filters', get_string('managefilters')); //TODO: add better string
 
@@ -127,7 +126,7 @@ class recent_form extends moodleform {
         }
 
         foreach ($modinfo->sections as $section=>$cmids) {
-            $options["section/$section"] = "-- ".get_section_name($COURSE, $sections[$section])." --";
+            $options["section/$section"] = "-- ".get_section_name($COURSE, $section)." --";
             foreach ($cmids as $cmid) {
                 $cm = $modinfo->cms[$cmid];
                 if (empty($modsused[$cm->modname]) or !$cm->uservisible) {
diff --git a/course/resources.php b/course/resources.php
index abf50b28d12..6debe853d08 100644
--- a/course/resources.php
+++ b/course/resources.php
@@ -65,9 +65,6 @@ echo $OUTPUT->header();
 
 $modinfo = get_fast_modinfo($course);
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 $cms = array();
 $resources = array();
 foreach ($modinfo->cms as $cm) {
@@ -116,7 +113,7 @@ foreach ($cms as $cm) {
         $printsection = '';
         if ($cm->sectionnum !== $currentsection) {
             if ($cm->sectionnum) {
-                $printsection = get_section_name($course, $sections[$cm->sectionnum]);
+                $printsection = get_section_name($course, $cm->sectionnum);
             }
             if ($currentsection !== '') {
                 $table->data[] = 'hr';
diff --git a/mod/assignment/index.php b/mod/assignment/index.php
index 71eb0237ed3..5adcbf2b91c 100644
--- a/mod/assignment/index.php
+++ b/mod/assignment/index.php
@@ -37,9 +37,6 @@ if (!$cms = get_coursemodules_in_course('assignment', $course->id, 'cm.idnumber,
 }
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 $timenow = time();
 
@@ -74,7 +71,7 @@ foreach ($modinfo->instances['assignment'] as $cm) {
     if ($usesections) {
         if ($cm->sectionnum !== $currentsection) {
             if ($cm->sectionnum) {
-                $printsection = get_section_name($course, $sections[$cm->sectionnum]);
+                $printsection = get_section_name($course, $cm->sectionnum);
             }
             if ($currentsection !== "") {
                 $table->data[] = 'hr';
diff --git a/mod/assignment/type/online/all.php b/mod/assignment/type/online/all.php
index 4b0ab8c46c0..ceef73d236a 100644
--- a/mod/assignment/type/online/all.php
+++ b/mod/assignment/type/online/all.php
@@ -47,8 +47,6 @@ $PAGE->navbar->add($str->onlinetext);
 // get all the assignments in the course
 $assignments = get_all_instances_in_course('assignment',$course, $USER->id );
 
-$sections = get_all_sections($course->id);
-
 // array to hold display data
 $views = array();
 
@@ -98,7 +96,7 @@ foreach( $assignments as $assignment ) {
     $view = new stdClass;
 
     // start to build view object
-    $view->section = get_section_name($course, $sections[$assignment->section]);
+    $view->section = get_section_name($course, $assignment->section);
 
     $view->name = $assignment->name;
     $view->submitted = $submitted;
diff --git a/mod/book/index.php b/mod/book/index.php
index b413ba3cc2c..75461889413 100644
--- a/mod/book/index.php
+++ b/mod/book/index.php
@@ -57,9 +57,6 @@ if (!$books = get_all_instances_in_course('book', $course)) {
 }
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 $table = new html_table();
 $table->attributes['class'] = 'generaltable mod_index';
@@ -80,7 +77,7 @@ foreach ($books as $book) {
         $printsection = '';
         if ($book->section !== $currentsection) {
             if ($book->section) {
-                $printsection = get_section_name($course, $sections[$book->section]);
+                $printsection = get_section_name($course, $book->section);
             }
             if ($currentsection !== '') {
                 $table->data[] = 'hr';
diff --git a/mod/chat/index.php b/mod/chat/index.php
index e000978bbf1..a56e489e971 100644
--- a/mod/chat/index.php
+++ b/mod/chat/index.php
@@ -38,9 +38,6 @@ if (! $chats = get_all_instances_in_course('chat', $course)) {
 }
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 /// Print the list of instances (your module will probably extend this)
 
@@ -69,7 +66,7 @@ foreach ($chats as $chat) {
     $printsection = '';
     if ($chat->section !== $currentsection) {
         if ($chat->section) {
-            $printsection = get_section_name($course, $sections[$chat->section]);
+            $printsection = get_section_name($course, $chat->section);
         }
         if ($currentsection !== '') {
             $table->data[] = 'hr';
diff --git a/mod/choice/index.php b/mod/choice/index.php
index e63b8763593..1d0ca001cf0 100644
--- a/mod/choice/index.php
+++ b/mod/choice/index.php
@@ -29,9 +29,6 @@
     }
 
     $usesections = course_format_uses_sections($course->format);
-    if ($usesections) {
-        $sections = get_all_sections($course->id);
-    }
 
     $sql = "SELECT cha.*
               FROM {choice} ch, {choice_answers} cha
@@ -76,7 +73,7 @@
             $printsection = "";
             if ($choice->section !== $currentsection) {
                 if ($choice->section) {
-                    $printsection = get_section_name($course, $sections[$choice->section]);
+                    $printsection = get_section_name($course, $choice->section);
                 }
                 if ($currentsection !== "") {
                     $table->data[] = 'hr';
diff --git a/mod/data/index.php b/mod/data/index.php
index f443b7e37fb..94a7323f394 100644
--- a/mod/data/index.php
+++ b/mod/data/index.php
@@ -56,9 +56,6 @@ if (! $datas = get_all_instances_in_course("data", $course)) {
 }
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 $timenow  = time();
 $strname  = get_string('name');
@@ -120,7 +117,7 @@ foreach ($datas as $data) {
     if ($usesections) {
         if ($data->section !== $currentsection) {
             if ($data->section) {
-                $printsection = get_section_name($course, $sections[$data->section]);
+                $printsection = get_section_name($course, $data->section);
             }
             if ($currentsection !== '') {
                 $table->data[] = 'hr';
diff --git a/mod/feedback/index.php b/mod/feedback/index.php
index 327264f642c..a1a42ff9cbb 100644
--- a/mod/feedback/index.php
+++ b/mod/feedback/index.php
@@ -61,9 +61,6 @@ if (! $feedbacks = get_all_instances_in_course("feedback", $course)) {
 }
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 /// Print the list of instances (your module will probably extend this)
 
@@ -105,7 +102,7 @@ foreach ($feedbacks as $feedback) {
     $link = '<a '.$dimmedclass.' href="'.$viewurl->out().'">'.$feedback->name.'</a>';
 
     if ($usesections) {
-        $tabledata = array (get_section_name($course, $sections[$feedback->section]), $link);
+        $tabledata = array (get_section_name($course, $feedback->section), $link);
     } else {
         $tabledata = array ($link);
     }
diff --git a/mod/folder/index.php b/mod/folder/index.php
index 5a3597dd795..9cbe696bdc7 100644
--- a/mod/folder/index.php
+++ b/mod/folder/index.php
@@ -54,9 +54,6 @@ if (!$folders = get_all_instances_in_course('folder', $course)) {
 }
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 $table = new html_table();
 $table->attributes['class'] = 'generaltable mod_index';
@@ -77,7 +74,7 @@ foreach ($folders as $folder) {
         $printsection = '';
         if ($folder->section !== $currentsection) {
             if ($folder->section) {
-                $printsection = get_section_name($course, $sections[$folder->section]);
+                $printsection = get_section_name($course, $folder->section);
             }
             if ($currentsection !== '') {
                 $table->data[] = 'hr';
diff --git a/mod/forum/discuss.php b/mod/forum/discuss.php
index 84132a6dc0b..efbb8df0457 100644
--- a/mod/forum/discuss.php
+++ b/mod/forum/discuss.php
@@ -219,7 +219,6 @@
         $modinfo = get_fast_modinfo($course);
         if (isset($modinfo->instances['forum'])) {
             $forummenu = array();
-            $sections = get_all_sections($course->id);
             // Check forum types and eliminate simple discussions.
             $forumcheck = $DB->get_records('forum', array('course' => $course->id),'', 'id, type');
             foreach ($modinfo->instances['forum'] as $forumcm) {
@@ -228,7 +227,7 @@
                     continue;
                 }
                 $section = $forumcm->sectionnum;
-                $sectionname = get_section_name($course, $sections[$section]);
+                $sectionname = get_section_name($course, $section);
                 if (empty($forummenu[$section])) {
                     $forummenu[$section] = array($sectionname => array());
                 }
diff --git a/mod/forum/index.php b/mod/forum/index.php
index 5d0b5c53bfe..fd91cc5fb6b 100644
--- a/mod/forum/index.php
+++ b/mod/forum/index.php
@@ -104,7 +104,6 @@ if ($show_rss = (($can_subscribe || $course->id == SITEID) &&
 }
 
 $usesections = course_format_uses_sections($course->format);
-$sections = get_all_sections($course->id);
 
 $table = new html_table();
 
@@ -358,7 +357,7 @@ if ($course->id != SITEID) {    // Only real courses have learning forums
             $forum->intro = shorten_text(format_module_intro('forum', $forum, $cm->id), $CFG->forum_shortpost);
 
             if ($cm->sectionnum != $currentsection) {
-                $printsection = get_section_name($course, $sections[$cm->sectionnum]);
+                $printsection = get_section_name($course, $cm->sectionnum);
                 if ($currentsection) {
                     $learningtable->data[] = 'hr';
                 }
diff --git a/mod/glossary/index.php b/mod/glossary/index.php
index 7979c29c3c3..b20829d1315 100644
--- a/mod/glossary/index.php
+++ b/mod/glossary/index.php
@@ -44,9 +44,6 @@ if (! $glossarys = get_all_instances_in_course("glossary", $course)) {
 }
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 /// Print the list of instances (your module will probably extend this)
 
@@ -88,7 +85,7 @@ foreach ($glossarys as $glossary) {
     if ($usesections) {
         if ($glossary->section !== $currentsection) {
             if ($glossary->section) {
-                $printsection = get_section_name($course, $sections[$glossary->section]);
+                $printsection = get_section_name($course, $glossary->section);
             }
             if ($currentsection !== "") {
                 $table->data[] = 'hr';
diff --git a/mod/imscp/index.php b/mod/imscp/index.php
index be1d4fa05d1..53505da6c4d 100644
--- a/mod/imscp/index.php
+++ b/mod/imscp/index.php
@@ -54,9 +54,6 @@ if (!$imscps = get_all_instances_in_course('imscp', $course)) {
 }
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 $table = new html_table();
 $table->attributes['class'] = 'generaltable mod_index';
@@ -77,7 +74,7 @@ foreach ($imscps as $imscp) {
         $printsection = '';
         if ($imscp->section !== $currentsection) {
             if ($imscp->section) {
-                $printsection = get_section_name($course, $sections[$imscp->section]);
+                $printsection = get_section_name($course, $imscp->section);
             }
             if ($currentsection !== '') {
                 $table->data[] = 'hr';
diff --git a/mod/lesson/index.php b/mod/lesson/index.php
index 27ae03aa2b6..67b717a80ad 100644
--- a/mod/lesson/index.php
+++ b/mod/lesson/index.php
@@ -62,9 +62,6 @@ if (! $lessons = get_all_instances_in_course("lesson", $course)) {
 }
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 /// Print the list of instances (your module will probably extend this)
 
@@ -113,7 +110,7 @@ foreach ($lessons as $lesson) {
                 $grade_value = $return[$USER->id]->rawgrade;
             }
         }
-        $table->data[] = array (get_section_name($course, $sections[$lesson->section]), $link, $grade_value, $due);
+        $table->data[] = array (get_section_name($course, $lesson->section), $link, $grade_value, $due);
     } else {
         $table->data[] = array ($link, $lesson->grade, $due);
     }
diff --git a/mod/lti/index.php b/mod/lti/index.php
index 65f59897303..346f6e1c3b8 100644
--- a/mod/lti/index.php
+++ b/mod/lti/index.php
@@ -79,9 +79,6 @@ $timenow = time();
 $strname = get_string("name");
 $strsectionname  = get_string('sectionname', 'format_'.$course->format);
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 $table = new html_table();
 $table->attributes['class'] = 'generaltable mod_index';
@@ -102,8 +99,8 @@ foreach ($basicltis as $basiclti) {
         $link = "<a href=\"view.php?id=$basiclti->coursemodule\">$basiclti->name</a>";
     }
 
-    if ($course->format == "weeks" or $course->format == "topics") {
-        $table->data[] = array ($basiclti->section, $link);
+    if ($usesections) {
+        $table->data[] = array (get_section_name($course, $basiclti->section), $link);
     } else {
         $table->data[] = array ($link);
     }
diff --git a/mod/page/index.php b/mod/page/index.php
index 8ea91657171..9843372b9f6 100644
--- a/mod/page/index.php
+++ b/mod/page/index.php
@@ -54,9 +54,6 @@ if (!$pages = get_all_instances_in_course('page', $course)) {
 }
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 $table = new html_table();
 $table->attributes['class'] = 'generaltable mod_index';
@@ -77,7 +74,7 @@ foreach ($pages as $page) {
         $printsection = '';
         if ($page->section !== $currentsection) {
             if ($page->section) {
-                $printsection = get_section_name($course, $sections[$page->section]);
+                $printsection = get_section_name($course, $page->section);
             }
             if ($currentsection !== '') {
                 $table->data[] = 'hr';
diff --git a/mod/quiz/index.php b/mod/quiz/index.php
index 8249d68e6ed..1d3063906cc 100644
--- a/mod/quiz/index.php
+++ b/mod/quiz/index.php
@@ -62,7 +62,6 @@ if (!$quizzes = get_all_instances_in_course("quiz", $course)) {
     notice(get_string('thereareno', 'moodle', $strquizzes), "../../course/view.php?id=$course->id");
     die;
 }
-$sections = get_all_sections($course->id);
 
 // Check if we need the closing date header.
 $showclosingheader = false;
@@ -132,7 +131,7 @@ foreach ($quizzes as $quiz) {
     if ($quiz->section != $currentsection) {
         if ($quiz->section) {
             $strsection = $quiz->section;
-            $strsection = get_section_name($course, $sections[$quiz->section]);
+            $strsection = get_section_name($course, $quiz->section);
         }
         if ($currentsection) {
             $learningtable->data[] = 'hr';
diff --git a/mod/resource/index.php b/mod/resource/index.php
index f3c516ca76d..3e9baf3d7d7 100644
--- a/mod/resource/index.php
+++ b/mod/resource/index.php
@@ -54,9 +54,6 @@ if (!$resources = get_all_instances_in_course('resource', $course)) {
 }
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 $table = new html_table();
 $table->attributes['class'] = 'generaltable mod_index';
@@ -77,7 +74,7 @@ foreach ($resources as $resource) {
         $printsection = '';
         if ($resource->section !== $currentsection) {
             if ($resource->section) {
-                $printsection = get_section_name($course, $sections[$resource->section]);
+                $printsection = get_section_name($course, $resource->section);
             }
             if ($currentsection !== '') {
                 $table->data[] = 'hr';
diff --git a/mod/scorm/index.php b/mod/scorm/index.php
index eb0428c4656..4daa0b45cb4 100644
--- a/mod/scorm/index.php
+++ b/mod/scorm/index.php
@@ -48,9 +48,6 @@ $PAGE->navbar->add($strscorms);
 echo $OUTPUT->header();
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 if ($usesections) {
     $sortorder = "cw.section ASC";
@@ -78,7 +75,7 @@ foreach ($scorms as $scorm) {
     $tt = "";
     if ($usesections) {
         if ($scorm->section) {
-            $tt = get_section_name($course, $sections[$scorm->section]);
+            $tt = get_section_name($course, $scorm->section);
         }
     } else {
         $tt = userdate($scorm->timemodified);
diff --git a/mod/survey/index.php b/mod/survey/index.php
index 6154acfa2f5..e9f2f3f5b39 100644
--- a/mod/survey/index.php
+++ b/mod/survey/index.php
@@ -33,9 +33,6 @@
     }
 
     $usesections = course_format_uses_sections($course->format);
-    if ($usesections) {
-        $sections = get_all_sections($course->id);
-    }
 
     $table = new html_table();
     $table->width = '100%';
@@ -58,7 +55,7 @@
         if ($usesections) {
             if ($survey->section !== $currentsection) {
                 if ($survey->section) {
-                    $printsection = get_section_name($course, $sections[$survey->section]);
+                    $printsection = get_section_name($course, $survey->section);
                 }
                 if ($currentsection !== "") {
                     $table->data[] = 'hr';
diff --git a/mod/url/index.php b/mod/url/index.php
index 524bda829ff..e5d096dd42c 100644
--- a/mod/url/index.php
+++ b/mod/url/index.php
@@ -54,9 +54,6 @@ if (!$urls = get_all_instances_in_course('url', $course)) {
 }
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 $table = new html_table();
 $table->attributes['class'] = 'generaltable mod_index';
@@ -77,7 +74,7 @@ foreach ($urls as $url) {
         $printsection = '';
         if ($url->section !== $currentsection) {
             if ($url->section) {
-                $printsection = get_section_name($course, $sections[$url->section]);
+                $printsection = get_section_name($course, $url->section);
             }
             if ($currentsection !== '') {
                 $table->data[] = 'hr';
diff --git a/mod/wiki/index.php b/mod/wiki/index.php
index 411aaa1a894..c2e3c6e328b 100644
--- a/mod/wiki/index.php
+++ b/mod/wiki/index.php
@@ -64,9 +64,6 @@ if (!$wikis = get_all_instances_in_course("wiki", $course)) {
 }
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 /// Print the list of instances (your module will probably extend this)
 
@@ -89,7 +86,7 @@ foreach ($wikis as $wiki) {
     $link = html_writer::link(new moodle_url('/mod/wiki/view.php', array('id' => $wiki->coursemodule)), $wiki->name, $linkcss);
 
     if ($usesections) {
-        $table->data[] = array(get_section_name($course, $sections[$wiki->section]), $link);
+        $table->data[] = array(get_section_name($course, $wiki->section), $link);
     } else {
         $table->data[] = array($link);
     }
diff --git a/mod/workshop/index.php b/mod/workshop/index.php
index 7a7ea2774cd..263807a87aa 100644
--- a/mod/workshop/index.php
+++ b/mod/workshop/index.php
@@ -55,9 +55,6 @@ if (! $workshops = get_all_instances_in_course('workshop', $course)) {
 }
 
 $usesections = course_format_uses_sections($course->format);
-if ($usesections) {
-    $sections = get_all_sections($course->id);
-}
 
 $timenow        = time();
 $strsectionname = get_string('sectionname', 'format_'.$course->format);
@@ -82,7 +79,7 @@ foreach ($workshops as $workshop) {
     }
 
     if ($usesections) {
-        $table->data[] = array(get_section_name($course, $sections[$workshop->section]), $link);
+        $table->data[] = array(get_section_name($course, $workshop->section), $link);
     } else {
         $table->data[] = array($link);
     }
diff --git a/report/log/locallib.php b/report/log/locallib.php
index fc08362349d..5fda822e387 100644
--- a/report/log/locallib.php
+++ b/report/log/locallib.php
@@ -226,13 +226,12 @@ function report_log_print_mnet_selector_form($hostid, $course, $selecteduser=0,
 /// Casting $course->modinfo to string prevents one notice when the field is null
     if ($modinfo = unserialize((string)$course->modinfo)) {
         $section = 0;
-        $sections = get_all_sections($course->id);
         foreach ($modinfo as $mod) {
             if ($mod->mod == "label") {
                 continue;
             }
             if ($mod->section > 0 and $section <> $mod->section) {
-                $activities["section/$mod->section"] = '--- '.get_section_name($course, $sections[$mod->section]).' ---';
+                $activities["section/$mod->section"] = '--- '.get_section_name($course, $mod->section).' ---';
             }
             $section = $mod->section;
             $mod->name = strip_tags(format_string($mod->name, true));
@@ -476,13 +475,12 @@ function report_log_print_selector_form($course, $selecteduser=0, $selecteddate=
 /// Casting $course->modinfo to string prevents one notice when the field is null
     if ($modinfo = unserialize((string)$course->modinfo)) {
         $section = 0;
-        $sections = get_all_sections($course->id);
         foreach ($modinfo as $mod) {
             if ($mod->mod == "label") {
                 continue;
             }
             if ($mod->section > 0 and $section <> $mod->section) {
-                $activities["section/$mod->section"] = '--- '.get_section_name($course, $sections[$mod->section]).' ---';
+                $activities["section/$mod->section"] = '--- '.get_section_name($course, $mod->section).' ---';
             }
             $section = $mod->section;
             $mod->name = strip_tags(format_string($mod->name, true));
diff --git a/report/outline/index.php b/report/outline/index.php
index f652ddf5bbb..15c7296d8f0 100644
--- a/report/outline/index.php
+++ b/report/outline/index.php
@@ -79,7 +79,6 @@ if ($showlastaccess) {
 }
 
 $modinfo = get_fast_modinfo($course);
-$sections = get_all_sections($course->id);
 
 $sql = "SELECT cm.id, COUNT('x') AS numviews, MAX(time) AS lasttime
           FROM {course_modules} cm
@@ -105,7 +104,7 @@ foreach ($modinfo->sections as $sectionnum=>$section) {
             $sectioncell = new html_table_cell();
             $sectioncell->colspan = count($outlinetable->head);
 
-            $sectiontitle = get_section_name($course, $sections[$sectionnum]);
+            $sectiontitle = get_section_name($course, $sectionnum);
 
             $sectioncell->text = $OUTPUT->heading($sectiontitle, 3);
             $sectionrow->cells[] = $sectioncell;
diff --git a/report/outline/user.php b/report/outline/user.php
index 2921c0cd774..2e34a2cfe89 100644
--- a/report/outline/user.php
+++ b/report/outline/user.php
@@ -66,21 +66,15 @@ $PAGE->set_heading($course->fullname);
 echo $OUTPUT->header();
 
 
-get_all_mods($course->id, $mods, $modnames, $modnamesplural, $modnamesused);
-$sections = get_all_sections($course->id);
+$modinfo = get_fast_modinfo($course);
+$sections = $modinfo->get_section_info_all();
 $itemsprinted = false;
 
-for ($i=0; $i<=$course->numsections; $i++) {
+foreach ($sections as $i => $section) {
 
-    if (isset($sections[$i])) {   // should always be true
-
-        $section = $sections[$i];
-        $showsection = (has_capability('moodle/course:viewhiddensections', $coursecontext) or $section->visible or !$course->hiddensections);
-
-        if ($showsection) { // prevent hidden sections in user activity. Thanks to Geoff Wilbert!
-            // Check the section has a sequence. This is the sequence of modules/resources.
-            // If there is no sequence there is nothing to display.
-            if ($section->sequence) {
+        if ($section->uservisible) { // prevent hidden sections in user activity. Thanks to Geoff Wilbert!
+            // Check the section has modules/resources, if not there is nothing to display.
+            if (!empty($modinfo->sections[$i])) {
                 $itemsprinted = true;
                 echo '<div class="section">';
                 echo '<h2>';
@@ -93,14 +87,10 @@ for ($i=0; $i<=$course->numsections; $i++) {
                     echo "<table cellpadding=\"4\" cellspacing=\"0\">";
                 }
 
-                $sectionmods = explode(",", $section->sequence);
-                foreach ($sectionmods as $sectionmod) {
-                    if (empty($mods[$sectionmod])) {
-                        continue;
-                    }
-                    $mod = $mods[$sectionmod];
+                foreach($modinfo->sections[$i] as $cmid) {
+                    $mod = $modinfo->cms[$cmid];
 
-                    if (empty($mod->visible)) {
+                    if (empty($mod->uservisible)) {
                         continue;
                     }
 
@@ -151,7 +141,6 @@ for ($i=0; $i<=$course->numsections; $i++) {
                 echo '</div>';  // section
             }
         }
-    }
 }
 
 if (!$itemsprinted) {