Single predicate causing bottleneck in queries

codeql query run --threads=0 still results in only one core being utilized, which severely affects query speed. I typically see this in
my log file:

Creating executor with (many) threads.
...
(0s) Starting to evaluate predicate ...

With 100% usage on 1 core.

Is Visual Studio more performant for this?

Start by reproducing the report with `codeql query run --threads=0` and compare the executor log with observed CPU usage. Investigate the single-predicate evaluation path and determine whether the behavior is expected or a performance defect; done means documenting the cause and an actionable resolution or limitation.

Written by the indexing model from the issue text.