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Pete Bacon Darwin 9318e23e64 perf(ngcc): use `EntryPointManifest` to speed up noop `ProgramBaseEntryPointFinder` (#37665) 
Previously the `ProgramBasedEntryPointFinder` was parsing all the
entry-points referenced by the program for dependencies even if all the
entry-points had been processed already.

Now this entry-point finder will re-use the `EntryPointManifest` to load
the entry-point dependencies when possible which avoids having to parse
them all again, on every invocation of ngcc.

Previously the `EntryPointManifest` was only used in the
`DirectoryWalkerEntryPointFinder`, which also contained the logic for
computing the contents of the manifest. This logic has been factored out
into an `EntryPointCollector` class. Both the `ProgramBasedEntryPointFinder`
and `DirectoryWalkerEntryPointFinder` now use the `EntryPointManifest` and
the `EntryPointCollector`.

The result of this change is that there is a small cost on the first run of
ngcc to compute and store the manifest - the processing takes 102% of the
processing time before this PR. But on subsequent runs there is a
significant benefit on subsequent runs - the processing takes around 50%
of the processing time before this PR.

PR Close #37665
 		2020-06-25 14:11:03 -07:00
..
src perf(ngcc): use `EntryPointManifest` to speed up noop `ProgramBaseEntryPointFinder` (#37665) 2020-06-25 14:11:03 -07:00
test perf(ngcc): use `EntryPointManifest` to speed up noop `ProgramBaseEntryPointFinder` (#37665) 2020-06-25 14:11:03 -07:00
BUILD.bazel refactor(ngcc): move `sourcemaps` into `ngtsc` (#37114) 2020-06-22 13:38:47 -07:00
README.md refactor(ivy): move ngcc into a higher level folder (#29092) 2019-03-20 14:45:54 -04:00
index.ts refactor(ngcc): move `logging` code into `ngtsc` (#37114) 2020-06-22 13:38:47 -07:00
main-ivy-ngcc.ts build: update license headers to reference Google LLC (#37205) 2020-05-26 14:26:58 -04:00
main-ngcc.ts build: update license headers to reference Google LLC (#37205) 2020-05-26 14:26:58 -04:00

README.md

Angular Compatibility Compiler (ngcc)

This compiler will convert node_modules compiled with ngc, into node_modules which appear to have been compiled with ngtsc.

This conversion will allow such "legacy" packages to be used by the Ivy rendering engine.

Building

The project is built using Bazel:

yarn bazel build //packages/compiler-cli/ngcc

Unit Testing

The unit tests are built and run using Bazel:

yarn bazel test //packages/compiler-cli/ngcc/test

Integration Testing

There are tests that check the behavior of the overall executable:

yarn bazel test //packages/compiler-cli/ngcc/test:integration