How can we update Drupal version?

Easy way to update Drupal website, we just have to follow some steps.

Step 1: Please take website full backup(files + database). We can use Backup and Migrate module ( https://www.drupal.org/project/backup_migrate )

Step 2: Site should be in maintanance mode because it can be broken updation time.

Step 3: Please take care of your patch code that already applied in core.

Step 4: Take a backup of Important files like 'robots.txt', '.htaccess', 'settings.php', 'web.config'. We will not update these files otherwise you will not get your old website.

Step 5: Now upload or override New version of drupal files except of given Step 4 files and 'modules','profiles','themes' folder because in new version these 3 folders will be empty.

Step 6: After full upload of files override Step 4 files.

Step 7: Clear the cache of website.

Step 8: Run update.php file via https://yourserver.com/update.php But by default this file is blocked, you have to enable this feature by setting.php file, go to setting.php file and change the option $settings['update_free_access'] = FALSE; to $settings['update_free_access'] = TRUE;

Step 9: After that save setting.php file and clear cache and hit https://yourserver.com/update.php after completion of process you can check you finally updation of site via https://yourserver.com/admin/reports/updates.

Note: If have any suggestions or issue regarding 'How can we update Drupal version?' then you can ask by comments. 

Why Drupal 8 Performance is better than Drupal 7?

Drupal 8 comes with Symfony framework, a high performing PHP framework with code security. Drupal 8 is faster than Drupal 7, here we have some points that can prove who is faster version in Drupal. 

1. Drupal 8 now turned on dynamic caching.
2. Drupal 8 turned on 6 week page caching for anonymous users. This makes Drupal 8 serving    anonymous user very fast.
3. Even logged in users can Benefit from performance improvement.
4. Drupal 8 does not send JavaScript to all pages, unless you need to use it.
5. Only place where Drupal 8 is slow in cold caching, if user is the first visitor of website in Drupal 8, it will be slower than Drupal 7 but because of cache improvement next time visitor will hit the page, it will be faster in Drupal 8.
6. Drupal 8 uses breakpoint media queries, which saves extra efforts to make a website responsive but in Drupal 7 does not use breakpoint media queries and has a different approach to manage how the site appears on different devices screens.
7. Drupal 8 uses Twig as a template engine. Twig is part of Symfony 2 framework and PHP based compiled template engine, however Drupal 7 uses the PHP template as default template engine and users create the templates by PHP code.
8. Symfony framework makes Drupal 8 stronger than Drupal 7 to develop secure and robust website or web applications.
9. Drupal 7 does not have powerful framework to manage its codebase. Developers still use Drupal 7 but its lack of framework features makes it hard to manage code.


Note: Why Drupal 8 Performance is better than Drupal 7?