Hello,

I have just test my website with bing's tools: http://www.microsoft.com/search/Tools/default.aspx
The test result is

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HTTP compression and conditional GET results

URL: http://www.shijile.com

HTTP status code: 200 OK

HTTP conditional GET: not enabled for the date selected
HTTP compression enabled using gzip

HTTP headers:

Transfer-Encoding: chunked
Connection: keep-alive
Pragma: no-cache
Cache-Control: max-age=86400,private
Content-Type: text/html
Date: Sat, 01 Aug 2009 12:57:43 GMT
Expires: Sun, 02 Aug 2009 12:57:43 GMT
Set-Cookie: PHPSESSID=e86i00j7mn1f88jm6mqlogjqd6; path=/
Server: nginx/0.7.61
X-Powered-By: PHP/5.1.6
Content-Encoding: gzip


For more information
Find the information you need to enhance your website with HTTP compression and conditional GET:
Blog: Announcing Crawler Improvements for bing
Blog: Optimizing your very large site for search - Part 2
Webmaster Center

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I am curious about this info: HTTP conditional GET not enabled. It is said that HTTP conditional GET will greatly improve the website performance.
I have searched Nginx wiki and this forum but get no result for this feature. Is there any setting equivalent to enable HTTP conditional GET? Or Nginx will implement it in the future?

Thanks