g1smd - 10:47 pm on Jan 6, 2011 (gmt 0)
The L flag is not needed. Use just [G], as G implies L.
The .htaccess file is the best way to fix this.
The server never gets as far as invoking PHP, passing data to that process, doing disk reads, processing PHP instructions, and so on, so the .htaccess version is very much quicker and way more efficient.
The doorman rejects the requests right at the front door.