Box API Slow Search Performance

Question

We have an enterprise Box account with about 17k files. Using the search endpoint it takes about 5-6 seconds to retrieve the first set of results from the query (see below).

https://api.box.com/2.0/search?query=fees&file_extensions=pdf&content_types=file_content&type=file&limit=200&offset=0

Can anything be done to improve the performance, or is that a typical response time? I noticed when using the Box website (see below), it appears much quicker 2-3 seconds.

https://app.box.com/folder/0/search?query=fees&pageSize=20&sortDirection=desc&types=pdf&kinds=file_content&metadata=&folderID=0

In addition, in the website search results there is an extract with highlighting, is that possible through the API? Is there a field that can be requested with this information?

EDIT - I was was able to improve the time slightly by using the fields parameter, but it was still 4-5 seconds to retrieve the first 200 matches.

fields=name,size,path_collection,created_at,modified_at