Alex Rickabaugh 78c76cecf9 perf(compiler-cli): optimize NgModule emit for standalone components (#49837) ...

NgModules which import standalone components currently list those components
in their injector definitions, because we assume that any standalone
component may export providers from its own imports.

This commit adds an optimization for that emit, which attempts to statically
analyze the NgModule imports and determine which standalone components, if
any are present, do not export providers and thus can be omitted.

This analysis is imperfect, because some imported components may be declared
outside of the current compilation, or transitively import types which are
declared outside the compilation. These types are therefore _assumed_ to
carry providers and so the optimization isn't applied to them.

PR Close #49837

2023-04-17 14:51:58 +00:00

39 KiB

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