Fist I was using default option of permalink and everything was fine (speed is ok, my own created theme is working fine) but now I change default structure to post name structure of permalink now I am not getting 404 error but the problems are :
1 - Whole website is loading very slow (pages,post) .
2 - My custom theme is not working fine means styles are not working on single page or single post.
I checked my .htaccess file where the code is :
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /wordpress_1/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /wordpress_1/index.php [L]
</IfModule>
# END WordPress
href="http://yoururl.com..."
part of the line loading your CSS. It should look likeyoururl.com/wp-content/themes/your-theme/style.css
.