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| <?php | |
| $db = new PDO('mysql:host=localhost;dbname=rmc2', 'root'); | |
| $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); | |
| function benchmark($callback){ | |
| $start = microtime(true); | |
| for ($i = 0; $i < 100; $i++) | |
| $callback(); | |
| return microtime(true) - $start; | |
| } | |
| function test_in($db, $query) { | |
| return function() use($db, $query) { | |
| $ids = []; | |
| $posts = []; | |
| foreach($db->query("SELECT * from post where $query LIMIT 100") as $post) { | |
| $posts[] = $post; | |
| $ids[] = $post['author_id']; | |
| } | |
| $authors = $db->query("SELECT id, username from user where id in (".implode(',', $ids).")")->fetchAll(); | |
| }; | |
| } | |
| function test_join($db, $query) { | |
| return function() use($db, $query) { | |
| $posts = $db->query("SELECT * from post where $query ")->fetchAll(); | |
| $authors = $db->query("SELECT a.id, a.username from user a | |
| JOIN post p ON p.author_id = a.id | |
| where p.$query LIMIT 100")->fetchAll(); | |
| }; | |
| } | |
| $in_time = benchmark(test_in($db, "title like '%yii%'")); | |
| $join_time = benchmark(test_join($db, "title like '%yii%'")); | |
| echo "Like test:\n"; | |
| printf("IN: %f s\n", $in_time)."\n"; | |
| printf("JOIN: %f s\n", $join_time)."\n"; | |
| echo "\n\n"; | |
| $in_time = benchmark(test_in($db, "comment_count>5")); | |
| $join_time = benchmark(test_join($db, "comment_count>5")); | |
| echo "Field test:\n"; | |
| printf("IN: %f s\n", $in_time)."\n"; | |
| printf("JOIN: %f s\n", $join_time)."\n"; | |
| echo "\n\n"; |
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