How to reproduce:
1. Open the attached "case_1152155-Charlie.zip" Unity project (see cloud link)
2. Open Quick Search (Help -> Quick Search) and make sure "AudioClip" is ticked in the "Asset (p:)" filter
3. Look up "ConfigAudio" and observe the effect

Expected result: Quick Search looks up objects without delay
Actual result: Quick Search performance drops unless the "AudioClip" filter is unticked

Reproducible with: 2019.1.3f1, 2019.2.0b2, 2019.3.0a2

Note: in the attached project, "AudioClip" is the filter which contains the large files. The package is supported on versions 2019.1 and later. On version 2019.3.0a1, performance drops when looking up AudioClip assets specifically (typing "Wave", "Title", "OST", etc. in Quick Search)