Hi. I often use the Page Link Field Type and this extremely slowly on my site because I have this stuff 3 times on page and my site have over 7 thousands posts and pages. So HTML markup of page have 21 thousands <option> tags (7000 * 3).
The browser renders the page is about 30 seconds (even from local site). This killed me %)
In future version, please make something like this (a native WordPress Feature — search entire all pages from one field):

Or give me any advice how to fix this in my case.