Why do 1C bank statements take a long time to load through the web interface?

Question

IIS

Win server 2008 R2
1C:Enterprise 8.3 (8.3.16.1296)
Enterprise accounting, edition 3.0 (3.0.79.11)

We have deployed a standard version of 1C with a file base on Win serv.
Also on this OS, the IIS web server was deployed and the 1C database was published.
When using 1C by other users also through a browser, the time for loading bank statements into the system greatly increases through the browser through Direct Bank 1C. At the same time, if you download via a thin client locally on the server, then this manipulation occurs very quickly.

Also, when trying to download through the browser, there is no load.