Each time an inspection is run, Scrutinizer-CI executes all the tools that you have configured in your build config. If you have configured multiple tools (which is the case for most projects), the system may decide to execute certain tools in parallel to speed up the process.
So far, you had to wait for all results to come in before they were displayed on the website. As of now, as soon as there are results available, you will see a small bar on the progress page which allows you to view these results instantly:
This provides you with feedback even faster. Enjoy!