Files loading slowly and preloading

When viewing many files in succession, there is often a long delay while a file loads. Network issues aside, is there any way to preload files? When looking through the source, it seems there is some mention of this, but I couldn't get anything to make a noticeable difference in loading time.

What would your recommendations be here? Would also be glad to make a PR if necessary.

Start by tracing the file-loading path in the source and reviewing the existing references to preloading. Measure loading behavior when viewing many files in succession; the issue does not name a file, test, or specific acceptance criteria, so completion would require agreeing on the recommendation or implementation and its validation.

Written by the indexing model from the issue text.