Installation is VERY slow with hardly NO users online

If you have nothing to add, you obviously have no clue about my issue.
To me it IS critical.

Thanks for your reply, my queries are not the issue here, as the page loading time is many times greater:
Create content page:

 Queries taking longer than 5 ms and queries executed more than once, are highlighted. Page execution time was 6820.14 ms.
ms	#	where	query
42.71	0	cache_get	SELECT data, created, headers, expire FROM cache_menu WHERE cid = '1:en'
1.92	0	block_list	SELECT DISTINCT b.* FROM blocks b LEFT JOIN blocks_roles r ON b.module = r.module AND b.delta = r.delta WHERE b.theme = 'garland' AND b.status = 1 AND (r.rid IN (2,3,4,5) OR r.rid IS NULL) ORDER BY b.region, b.weight, b.module
1.77	0	_nodewords_detect_type_and_ids	SELECT * FROM view_view WHERE url LIKE 'node/add%' AND page = 1
1.23	0	module_list	SELECT name, filename, throttle FROM system WHERE type = 'module' AND status = 1 ORDER BY weight ASC, filename ASC
0.81	0	generate_quickview	SELECT COUNT(nid) AS c FROM comments WHERE status = 1
0.79	0	_node_types_build	SELECT nt.type, nt.* FROM node_type nt ORDER BY nt.type ASC
...

Watchdog logs;

 Queries taking longer than 5 ms and queries executed more than once, are highlighted. Page execution time was 6058.16 ms.
ms	#	where	query
178.77	0	cache_get	SELECT data, created, headers, expire FROM cache_menu WHERE cid = '1:en'
36.33	0	module_list	SELECT name, filename, throttle FROM system WHERE type = 'module' AND status = 1 ORDER BY weight ASC, filename ASC
28.61	0	_watchdog_get_message_types	SELECT DISTINCT(type) FROM watchdog ORDER BY type
13.51	0	pager_query	SELECT w.wid, w.uid, w.severity, w.type, w.timestamp, w.message, w.link, u.name FROM watchdog w INNER JOIN users u ON w.uid = u.uid ORDER BY w.wid DESC LIMIT 0, 50
5.64	0	pager_query	SELECT COUNT(*) FROM watchdog w INNER JOIN users u ON w.uid = u.uid
1.89	0	block_list	SELECT DISTINCT b.* FROM blocks b LEFT JOIN blocks_roles r ON b.module = r.module AND b.delta = r.delta WHERE b.theme = 'garland' AND b.status = 1 AND (r.rid IN (2,3,4,5) OR r.rid IS NULL) ORDER BY b.region, b.weight, b.module
0.89	0	_node_types_build	SELECT nt.type, nt.* FROM node_type nt ORDER BY nt.type ASC
0.84	0	generate_quickview	SELECT COUNT(nid) AS c FROM comments WHERE status = 1
0.84	0	drupal_lookup_path	SELECT dst FROM url_alias WHERE src = 'admin/logs/pages'
0.8	0	drupal_lookup_path	SELECT dst FROM url_alias WHERE src = 'admin/logs/visitors'
...

My apologies for spamming the forum, but I really want to know what's up with this. And what is the priority used for then?

´Sorry for late feedback.

Shared hosting was the problem.