A page in the app giant card

Today, a friend of the author said his company's app (no PC side), click on a course Page giant slow, asked if I was not enough resources to upgrade?

I click to see a bit, based on experience may be a database query problem, light card 20 seconds heavy card 2 minutes, log in to the database show full processlist; When the page card is found, there is no sentence to stay, all the resources are sufficient, look at the log and almost nothing unusual, So I'm a little messy. Pound, on fiddler.

Results:

I put these red links to the Web page to request to find that the host, after asking the host is a test machine, but the server expired, and the development of the code to the official line some resources link or the machine. The loading of resources is policy and sequential, so when the host hosting these resources does not exist, the client is unable to get a quick feedback directly, so it becomes a giant card.

A page in the app giant card