Browser settings and performance

Depending on the browser you use, browser settings can affect the peformance of your instance.

Compression

Web pages in your instance can be large, for example, over 500 kb for a long list of incidents with many columns. To speed performance, most browsers can accept compressed data from an application server so that the full 500 kb does not have to be sent over the wire. Instead, the browser indicates that it can accept compressed data if the server can send it. The app server then compresses the response, which transforms the 500 kb data to about 20 kb.

Compression is enabled by default on all ServiceNow application servers. The application server always sends compressed data if your browser accepts it. There are browser settings that control whether your browser accepts compressed responses.

In Microsoft Internet Explorer (IE), navigate to Tools > Internet Options. Ensure that the following two check boxes are selected in the Advanced tab.
  • Use HTTP 1.1
  • Use HTTP 1.1 through a proxy server
Figure 1. Internet options
Windows internet options

Frequently, a proxy or edge device in the environment disables gzip compression. Enabling gzip compression also speeds up the interactions.

Cache items from https locations

If you enforce an IE policy to never cache items from an https location, every interaction must refetch a large amount of JavaScript and images from the server, which affects performance. The IE option is Do not save encrypted pages to disk, and the default is off.