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perf(build): Use WebWorker when removing private fields
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| import * as ts from 'typescript' | ||
|
|
||
| type UUID = number // ReturnType<typeof crypto.randomUUID> | ||
|
|
||
| export type WorkerInput = { | ||
| file: string | ||
| taskId: UUID | ||
| } | ||
|
|
||
| export type WorkerOutput = | ||
| | { | ||
| type: 'success' | ||
| value: string | ||
| taskId: UUID | ||
| } | ||
| | { | ||
| type: 'error' | ||
| value: unknown | ||
| taskId: UUID | ||
| } | ||
|
|
||
| const removePrivateTransformer = <T extends ts.Node>(ctx: ts.TransformationContext) => { | ||
| const visit: ts.Visitor = (node) => { | ||
| if (ts.isClassDeclaration(node)) { | ||
| const newMembers = node.members.filter((elem) => { | ||
| if (ts.isPropertyDeclaration(elem) || ts.isMethodDeclaration(elem)) { | ||
| for (const modifier of elem.modifiers ?? []) { | ||
| if (modifier.kind === ts.SyntaxKind.PrivateKeyword) { | ||
| return false | ||
| } | ||
| } | ||
| } | ||
| if (elem.name && ts.isPrivateIdentifier(elem.name)) { | ||
| return false | ||
| } | ||
| return true | ||
| }) | ||
| return ts.factory.createClassDeclaration( | ||
| node.modifiers, | ||
| node.name, | ||
| node.typeParameters, | ||
| node.heritageClauses, | ||
| newMembers | ||
| ) | ||
| } | ||
| return ts.visitEachChild(node, visit, ctx) | ||
| } | ||
|
|
||
| return (node: T) => { | ||
| const visited = ts.visitNode(node, visit) | ||
| if (!visited) { | ||
| throw new Error('The result visited is undefined.') | ||
| } | ||
| return visited | ||
| } | ||
| } | ||
|
|
||
| export const removePrivateFields = (tsPath: string) => { | ||
| const program = ts.createProgram([tsPath], { | ||
| target: ts.ScriptTarget.ESNext, | ||
| module: ts.ModuleKind.ESNext, | ||
| }) | ||
| const file = program.getSourceFile(tsPath) | ||
|
|
||
| const transformed = ts.transform(file!, [removePrivateTransformer]) | ||
| const printer = ts.createPrinter() | ||
| const transformedSourceFile = transformed.transformed[0] as ts.SourceFile | ||
| const code = printer.printFile(transformedSourceFile) | ||
| transformed.dispose() | ||
| return code | ||
| } | ||
|
|
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| declare const self: Worker | ||
|
|
||
| if (globalThis.self) { | ||
| self.addEventListener('message', function (e) { | ||
| const { file, taskId } = e.data as WorkerInput | ||
|
|
||
| try { | ||
| const result = removePrivateFields(file) | ||
| self.postMessage({ type: 'success', value: result, taskId } satisfies WorkerOutput) | ||
| } catch (e) { | ||
| console.error(e) | ||
| self.postMessage({ type: 'error', value: e, taskId } satisfies WorkerOutput) | ||
| } | ||
| }) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,52 +1,41 @@ | ||
| import * as ts from 'typescript' | ||
| import { cpus } from 'node:os' | ||
| import type { WorkerInput, WorkerOutput } from './remove-private-fields-worker' | ||
|
|
||
| const removePrivateTransformer = <T extends ts.Node>(ctx: ts.TransformationContext) => { | ||
| const visit: ts.Visitor = (node) => { | ||
| if (ts.isClassDeclaration(node)) { | ||
| const newMembers = node.members.filter((elem) => { | ||
| if (ts.isPropertyDeclaration(elem) || ts.isMethodDeclaration(elem)) { | ||
| for (const modifier of elem.modifiers ?? []) { | ||
| if (modifier.kind === ts.SyntaxKind.PrivateKeyword) { | ||
| return false | ||
| } | ||
| } | ||
| } | ||
| if (elem.name && ts.isPrivateIdentifier(elem.name)) { | ||
| return false | ||
| } | ||
| return true | ||
| }) | ||
| return ts.factory.createClassDeclaration( | ||
| node.modifiers, | ||
| node.name, | ||
| node.typeParameters, | ||
| node.heritageClauses, | ||
| newMembers | ||
| ) | ||
| } | ||
| return ts.visitEachChild(node, visit, ctx) | ||
| } | ||
| const workers = Array.from({ length: Math.ceil(cpus().length / 2) }).map( | ||
| () => new Worker(`${import.meta.dirname}/remove-private-fields-worker.ts`), | ||
| { type: 'module' } | ||
| ) | ||
| let workerIndex = 0 | ||
| let taskId = 0 | ||
|
|
||
| return (node: T) => { | ||
| const visited = ts.visitNode(node, visit) | ||
| if (!visited) { | ||
| throw new Error('The result visited is undefined.') | ||
| } | ||
| return visited | ||
| } | ||
| } | ||
| export async function removePrivateFields(file: string): Promise<string> { | ||
| const currentTaskId = taskId++ | ||
| const worker = workers[workerIndex] | ||
| workerIndex = (workerIndex + 1) % workers.length | ||
|
|
||
| export const removePrivateFields = (tsPath: string) => { | ||
| const program = ts.createProgram([tsPath], { | ||
| target: ts.ScriptTarget.ESNext, | ||
| module: ts.ModuleKind.ESNext, | ||
| return new Promise<string>((resolve, reject) => { | ||
| const abortController = new AbortController() | ||
| worker.addEventListener( | ||
| 'message', | ||
| ({ data: { type, value, taskId } }: { data: WorkerOutput }) => { | ||
| if (taskId === currentTaskId) { | ||
| if (type === 'success') { | ||
| resolve(value) | ||
| } else { | ||
| reject(value) | ||
| } | ||
|
|
||
| abortController.abort() | ||
| } | ||
| }, | ||
| { signal: abortController.signal } | ||
| ) | ||
| worker.postMessage({ file, taskId: currentTaskId } satisfies WorkerInput) | ||
| }) | ||
| const file = program.getSourceFile(tsPath) | ||
| } | ||
|
|
||
| const transformed = ts.transform(file!, [removePrivateTransformer]) | ||
| const printer = ts.createPrinter() | ||
| const transformedSourceFile = transformed.transformed[0] as ts.SourceFile | ||
| const code = printer.printFile(transformedSourceFile) | ||
| transformed.dispose() | ||
| return code | ||
| export function cleanupWorkers() { | ||
| for (const worker of workers) { | ||
| worker.terminate() | ||
| } | ||
| } |