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perf(v2): improve dev build time by not overwriting file if possible (#2089)

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* perf(v2): improve sequential build time by not overwriting file if possible

* minor improvement

* docs
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Endi 2019-12-06 12:17:41 +07:00 • committed by GitHub
parent ff4851982c
commit 32c9d07b90
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2 changed files with 14 additions and 1 deletions
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14
packages/docusaurus-utils/src/index.ts
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@ -27,7 +27,19 @@ export async function generate(
return;
}
const lastHash = fileHash.get(filepath);
let lastHash = fileHash.get(filepath);
// If file already exist but its not in runtime cache hash yet,
// we try to calculate the content hash and then compare
// This is to avoid unnecessary overwrite and we can reuse old file
if (!lastHash && fs.existsSync(filepath)) {
const lastContent = await fs.readFile(filepath, 'utf8');
lastHash = createHash('md5')
.update(lastContent)
.digest('hex');
fileHash.set(filepath, lastHash);
}
const currentHash = createHash('md5')
.update(content)
.digest('hex');