perf(compiler-cli): minimize filesystem calls when generating shims #47682
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Previously when a file was being analyzed to determine if a shim should be generated, up to two calls to the host `fileExists` function per file per generator were made. In the default host, each `fileExists` call made two underlying file system calls. Following these calls, the file was then read via `getSourceFile`. However, `getSourceFile` will return `undefined` if the requested file does not exist. As a result, `getSourceFile` can be used directly to request both potential file names and leverage the return value to determine if the file does not exist. This avoids the need to call `fileExists` at all.
clydin
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area: compiler
JoostK
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Oct 6, 2022
clydin
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target: patch
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This PR was merged into the repository by commit a792bf1. |
jessicajaniuk
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Oct 7, 2022
…47682) Previously when a file was being analyzed to determine if a shim should be generated, up to two calls to the host `fileExists` function per file per generator were made. In the default host, each `fileExists` call made two underlying file system calls. Following these calls, the file was then read via `getSourceFile`. However, `getSourceFile` will return `undefined` if the requested file does not exist. As a result, `getSourceFile` can be used directly to request both potential file names and leverage the return value to determine if the file does not exist. This avoids the need to call `fileExists` at all. PR Close #47682
crapStone
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Oct 13, 2022
This PR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [@angular/animations](https://github.com/angular/angular) | dependencies | patch | [`14.2.5` -> `14.2.6`](https://renovatebot.com/diffs/npm/@angular%2fanimations/14.2.5/14.2.6) | | [@angular/common](https://github.com/angular/angular) | dependencies | patch | [`14.2.5` -> `14.2.6`](https://renovatebot.com/diffs/npm/@angular%2fcommon/14.2.5/14.2.6) | | [@angular/compiler](https://github.com/angular/angular) | dependencies | patch | [`14.2.5` -> `14.2.6`](https://renovatebot.com/diffs/npm/@angular%2fcompiler/14.2.5/14.2.6) | | [@angular/compiler-cli](https://github.com/angular/angular/tree/main/packages/compiler-cli) ([source](https://github.com/angular/angular)) | devDependencies | patch | [`14.2.5` -> `14.2.6`](https://renovatebot.com/diffs/npm/@angular%2fcompiler-cli/14.2.5/14.2.6) | | [@angular/core](https://github.com/angular/angular) | dependencies | patch | [`14.2.5` -> `14.2.6`](https://renovatebot.com/diffs/npm/@angular%2fcore/14.2.5/14.2.6) | | [@angular/forms](https://github.com/angular/angular) | dependencies | patch | [`14.2.5` -> `14.2.6`](https://renovatebot.com/diffs/npm/@angular%2fforms/14.2.5/14.2.6) | | [@angular/platform-browser](https://github.com/angular/angular) | dependencies | patch | [`14.2.5` -> `14.2.6`](https://renovatebot.com/diffs/npm/@angular%2fplatform-browser/14.2.5/14.2.6) | | [@angular/platform-browser-dynamic](https://github.com/angular/angular) | dependencies | patch | [`14.2.5` -> `14.2.6`](https://renovatebot.com/diffs/npm/@angular%2fplatform-browser-dynamic/14.2.5/14.2.6) | --- ### Release Notes <details> <summary>angular/angular</summary> ### [`v14.2.6`](https://github.com/angular/angular/blob/HEAD/CHANGELOG.md#​1426-2022-10-12) [Compare Source](angular/angular@14.2.5...14.2.6) ##### compiler-cli | Commit | Type | Description | | -- | -- | -- | | [3fd176a905](angular/angular@3fd176a) | fix | add missing period to error message ([#​47744](angular/angular#47744)) | | [c3821f5ab5](angular/angular@c3821f5) | perf | minimize filesystem calls when generating shims ([#​47682](angular/angular#47682)) | #### Special Thanks Alan Agius, Andrew Kushnir, Andrew Scott, Aristeidis Bampakos, Bob Watson, Charles Lyding, Joey Perrott, Joshua Morony, Mathew Berg, Paul Gschwendtner, Peter Dickten, Renan Ferro, Sri Ram, WD Snoeijer, markostanimirovic and Álvaro Martínez <!-- CHANGELOG SPLIT MARKER --> </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about these updates again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, click this checkbox. --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzMi4yMzQuMiIsInVwZGF0ZWRJblZlciI6IjMyLjIzNi4xIn0=--> Co-authored-by: cabr2-bot <[email protected]> Reviewed-on: https://codeberg.org/Calciumdibromid/CaBr2/pulls/1582 Reviewed-by: Epsilon_02 <[email protected]> Co-authored-by: Calciumdibromid Bot <[email protected]> Co-committed-by: Calciumdibromid Bot <[email protected]>
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Previously when a file was being analyzed to determine if a shim should be generated, up to two calls to the host
fileExistsfunction per file per generator were made. In the default host, eachfileExistscall made two underlying file system calls. Following these calls, the file was then read viagetSourceFile. However,getSourceFilewill returnundefinedif the requested file does not exist. As a result,getSourceFilecan be used directly to request both potential file names and leverage the return value to determine if the file does not exist. This avoids the need to callfileExistsat all.