History

JoostK 58411e7ad9 perf(ngcc): introduce cache for sharing data across entry-points (#38840 )

ngcc creates typically two `ts.Program` instances for each entry-point,
one for processing sources and another one for processing the typings.
The creation of these programs is somewhat expensive, as it concerns
module resolution and parsing of source files.

This commit implements several layers of caching to optimize the
creation of programs:

1. A shared module resolution cache across all entry-points within a
   single invocation of ngcc. Both the sources and typings program
   benefit from this cache.
2. Sharing the parsed `ts.SourceFile` for a single entry-point between
   the sources and typings program.
3. Sharing parsed `ts.SourceFile`s of TypeScript's default libraries
   across all entry-points within a single invocation. Some of these
   default library typings are large and therefore expensive to parse,
   so sharing the parsed source files across all entry-points offers
   a significant performance improvement.

Using a bare CLI app created using `ng new` + `ng add @angular/material`,
the above changes offer a 3-4x improvement in ngcc's processing time
when running synchronously and ~2x improvement for asynchronous runs.

PR Close #38840

2020-09-15 11:23:18 -07:00

src

perf(ngcc): introduce cache for sharing data across entry-points (#38840 )

2020-09-15 11:23:18 -07:00

test

perf(ngcc): introduce cache for sharing data across entry-points (#38840 )

2020-09-15 11:23:18 -07:00

BUILD.bazel

refactor(ngcc): move sourcemaps into ngtsc (#37114 )

2020-06-22 13:38:47 -07:00

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

refactor(ivy): move ngcc into a higher level folder (#29092 )

2019-03-20 14:45:54 -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