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perf(ngcc): cache parsed tsconfig between runs (#37417)

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This commit will store a cached copy of the parsed tsconfig
that can be reused if the tsconfig path is the same.

This will improve the ngcc "noop" case, where there is no processing
to do, when the entry-points have already been processed.
Previously we were parsing this config every time we checked for
entry-points to process, which can take up to seconds in some
cases.

Resolves #36882

PR Close #37417
This commit is contained in:
Pete Bacon Darwin
2020-06-03 17:18:46 +01:00
committed by atscott
parent 6a0d2ed6c8
commit f9daa136c3
4 changed files with 110 additions and 2 deletions
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2
packages/compiler-cli/ngcc/index.ts
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@ -12,7 +12,7 @@ import {AsyncNgccOptions, SyncNgccOptions} from './src/ngcc_options';
export {ConsoleLogger} from './src/logging/console_logger';
export {Logger, LogLevel} from './src/logging/logger';
export {AsyncNgccOptions, NgccOptions, SyncNgccOptions} from './src/ngcc_options';
export {AsyncNgccOptions, clearTsConfigCache, NgccOptions, SyncNgccOptions} from './src/ngcc_options';
export {PathMappings} from './src/path_mappings';
export function process<T extends AsyncNgccOptions|SyncNgccOptions>(options: T):