Problem with large static files

[etrader]

Thanks for very useful description, Maxim!
Actually, I suspected the nature of 0.000 request time; but what makes
me wonder is that it takes only 3ms to process a relatively php file
with output of 5KB. Then, why reading a static file of 15KB should take
600ms? If it is normally the case, isn't it better to save images as
data instead of file? PHP should process a base64 string faster.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,220272,220284#msg-220284