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perf(plugin): lazily initialize MagicString and remove the redundant pre-check

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This commit is contained in:
alex8088 2025-10-19 14:42:35 +08:00
parent c7955aa6fd
commit 0fb8918090
4 changed files with 54 additions and 51 deletions
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44
src/plugins/asset.ts
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@ -107,31 +107,27 @@ export default function assetPlugin(): Plugin {
let s: MagicString | undefined let s: MagicString | undefined
nodeAssetRE.lastIndex = 0 nodeAssetRE.lastIndex = 0
if (code.match(nodeAssetRE)) { while ((match = nodeAssetRE.exec(code))) {
while ((match = nodeAssetRE.exec(code))) { s ||= new MagicString(code)
s ||= new MagicString(code) const [full, hash] = match
const [full, hash] = match const filename = this.getFileName(hash)
const filename = this.getFileName(hash) const outputFilepath = toRelativePath(filename, chunk.fileName)
const outputFilepath = toRelativePath(filename, chunk.fileName) const replacement = JSON.stringify(outputFilepath)
const replacement = JSON.stringify(outputFilepath) s.overwrite(match.index, match.index + full.length, replacement, {
s.overwrite(match.index, match.index + full.length, replacement, { contentOnly: true
contentOnly: true })
})
}
} }
nodePublicAssetRE.lastIndex = 0 nodePublicAssetRE.lastIndex = 0
if (code.match(nodePublicAssetRE)) { while ((match = nodePublicAssetRE.exec(code))) {
while ((match = nodePublicAssetRE.exec(code))) { s ||= new MagicString(code)
s ||= new MagicString(code) const [full, hash] = match
const [full, hash] = match const filename = publicAssetPathCache.get(hash)!
const filename = publicAssetPathCache.get(hash)! const outputFilepath = toRelativePath(filename, normalizePath(path.join(outDir, chunk.fileName)))
const outputFilepath = toRelativePath(filename, normalizePath(path.join(outDir, chunk.fileName))) const replacement = JSON.stringify(outputFilepath)
const replacement = JSON.stringify(outputFilepath) s.overwrite(match.index, match.index + full.length, replacement, {
s.overwrite(match.index, match.index + full.length, replacement, { contentOnly: true
contentOnly: true })
})
}
} }
if (s) { if (s) {
@ -139,9 +135,9 @@ export default function assetPlugin(): Plugin {
code: s.toString(), code: s.toString(),
map: sourcemap ? s.generateMap({ hires: 'boundary' }) : null map: sourcemap ? s.generateMap({ hires: 'boundary' }) : null
} }
} else {
return null
} }
return null
} }
} }
} }

9
src/plugins/bytecode.ts
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@ -255,17 +255,20 @@ export function bytecodePlugin(options: BytecodeOptions = {}): Plugin | null {
const chunk = output[name] const chunk = output[name]
if (chunk.type === 'chunk') { if (chunk.type === 'chunk') {
let _code = chunk.code let _code = chunk.code
if (bytecodeRE && _code.match(bytecodeRE)) { if (bytecodeRE) {
let match: RegExpExecArray | null let match: RegExpExecArray | null
const s = new MagicString(_code) let s: MagicString | undefined
while ((match = bytecodeRE.exec(_code))) { while ((match = bytecodeRE.exec(_code))) {
s ||= new MagicString(_code)
const [prefix, chunkName] = match const [prefix, chunkName] = match
const len = prefix.length + chunkName.length const len = prefix.length + chunkName.length
s.overwrite(match.index, match.index + len, prefix + chunkName + 'c', { s.overwrite(match.index, match.index + len, prefix + chunkName + 'c', {
contentOnly: true contentOnly: true
}) })
} }
_code = s.toString() if (s) {
_code = s.toString()
}
} }
if (bytecodeChunks.includes(name)) { if (bytecodeChunks.includes(name)) {
const bytecodeBuffer = await compileToBytecode(_code) const bytecodeBuffer = await compileToBytecode(_code)

26
src/plugins/modulePath.ts
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@ -38,20 +38,22 @@ export default function modulePathPlugin(config: InlineConfig): Plugin {
} }
}, },
renderChunk(code, chunk, { sourcemap }): { code: string; map: SourceMapInput } | null { renderChunk(code, chunk, { sourcemap }): { code: string; map: SourceMapInput } | null {
if (code.match(modulePathRE)) { let match: RegExpExecArray | null
let match: RegExpExecArray | null let s: MagicString | undefined
const s = new MagicString(code)
while ((match = modulePathRE.exec(code))) { modulePathRE.lastIndex = 0
const [full, hash] = match while ((match = modulePathRE.exec(code))) {
const filename = this.getFileName(hash) s ||= new MagicString(code)
const outputFilepath = toRelativePath(filename, chunk.fileName) const [full, hash] = match
const replacement = JSON.stringify(outputFilepath) const filename = this.getFileName(hash)
s.overwrite(match.index, match.index + full.length, replacement, { const outputFilepath = toRelativePath(filename, chunk.fileName)
contentOnly: true const replacement = JSON.stringify(outputFilepath)
}) s.overwrite(match.index, match.index + full.length, replacement, {
} contentOnly: true
})
}
if (s) {
return { return {
code: s.toString(), code: s.toString(),
map: sourcemap ? s.generateMap({ hires: 'boundary' }) : null map: sourcemap ? s.generateMap({ hires: 'boundary' }) : null

26
src/plugins/worker.ts
View File

@ -37,20 +37,22 @@ export default function workerPlugin(): Plugin {
} }
}, },
renderChunk(code, chunk, { sourcemap }): { code: string; map: SourceMapInput } | null { renderChunk(code, chunk, { sourcemap }): { code: string; map: SourceMapInput } | null {
if (code.match(nodeWorkerAssetUrlRE)) { let match: RegExpExecArray | null
let match: RegExpExecArray | null let s: MagicString | undefined
const s = new MagicString(code)
while ((match = nodeWorkerAssetUrlRE.exec(code))) { nodeWorkerAssetUrlRE.lastIndex = 0
const [full, hash] = match while ((match = nodeWorkerAssetUrlRE.exec(code))) {
const filename = this.getFileName(hash) s ||= new MagicString(code)
const outputFilepath = toRelativePath(filename, chunk.fileName) const [full, hash] = match
const replacement = JSON.stringify(outputFilepath) const filename = this.getFileName(hash)
s.overwrite(match.index, match.index + full.length, replacement, { const outputFilepath = toRelativePath(filename, chunk.fileName)
contentOnly: true const replacement = JSON.stringify(outputFilepath)
}) s.overwrite(match.index, match.index + full.length, replacement, {
} contentOnly: true
})
}
if (s) {
return { return {
code: s.toString(), code: s.toString(),
map: sourcemap ? s.generateMap({ hires: 'boundary' }) : null map: sourcemap ? s.generateMap({ hires: 'boundary' }) : null