When it comes to finding regular class (of `PsiClass`) from the given
`ClassId`, we've reinvented the wheel in a worse way. `JavaFileManager`
is there to find `PsiClass`, and we already build/populate index for
that while initializing AA standalone mode's own project environment.
We can simply load that manager and send a query, that's it.
However, our efforts so far on binary PSI declaration providers are not
entirely useless. `JavaFileManager` can't handle top-level declarations
and search for all callables/classes in a given package in general. So,
we can still use existing logic for non-ClassId queries. We just need to
cache the intermediate results: fq name to `VirtualFile`s.
To fully utilize the aforementioned cache, we also need to cache an
instance of `KotlinPsiDeclarationProvider`.
Combing these three ideas, now running K2 UAST on a very large module is
"on par", e.g.,
K1:
//tools/adt/idea/android:intellij.android.core_lint_test PASSED in 112.8s
Stats over 7 runs: max = 112.8s, min = 104.3s, avg = 107.9s, dev = 3.6s
K2 (before):
//tools/adt/idea/android:intellij.android.core_lint_test PASSED in 303.0s
Stats over 7 runs: max = 303.0s, min = 286.8s, avg = 294.4s, dev = 5.0s
K2 (after):
//tools/adt/idea/android:intellij.android.core_lint_test PASSED in 112.8s
Stats over 7 runs: max = 112.8s, min = 105.7s, avg = 108.9s, dev = 2.4s
Jinseong Jeon
cec299ac0a