* perf(java): count usage lenses in the project sources only
Usage lenses asked JDT LS for a full references search per declaration,
which also scans every dependency jar and the JDK. In a library class such
as java.lang.String that kept JDT LS busy for tens of seconds per pass,
and failed counts were asked again on every scroll.
- Scoped Java searches without libraries pass the "sources" scope.
- Lenses count declarations near the viewport (10 lines instead of 60).
- Incomplete counts are remembered per document version and asked again
once the server settles, instead of on every pass.
* perf(java): turn off the language server's own reference lenses
JDT LS shows a references lens above each declaration by default and the
editor resolved them all at once, a references search per declaration on
every open and edit. The editor's usage lenses already count usages.
* style(editor): keep the usage lens's unrelated lines as they were
l0ng-ai
89c7ae7d4c