1) do you really need all these site statistics (TOP by hits, etc)? If you dont, you can remove it by doing this:
in home.php find first line:
show_table_footer();
Insert below:
/*
Then find second line:
show_table_footer();
Insert above:
*/
2) if your server is on linux and SAFE MODE is off (or atleast if you can use
exec() function, then you can try modify get_dir_size() function in admin_functions.php so instead calculating directory size by scanning each file one-by-one, you can execute a server side command that returns the directory size much faster. So you can try this:
find:
$size = 0;
Insert above:
$size = explode(" ", @exec("du -csb \"".$dir."\""));
$size = $size[0];
return $size;
Or, you can simply disable showing media and thumbnails folder sizes by inserting this instead of the three lines above:
return;
These modifications increased speed my ACP from 10+ secs to 1 secs