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Optimize frontend build time with caching and parallel processing #5290

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Optimize frontend build time with caching and parallel processing #5290

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cdf0309
Initial plan
Copilot Nov 2, 2025
c524ec8
Enable build performance optimizations
Copilot Nov 2, 2025
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1 change: 1 addition & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@ common-dist/
packages/cbioportal-frontend-commons/dist
.sass-cache
.rpt2_cache
.webpack-cache/
frontend-cbioportal.iml
test/
.classpath
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4 changes: 3 additions & 1 deletion tsconfig.json
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Expand Up @@ -21,7 +21,9 @@
"typeRoots": [
"node_modules/@types"
],
"lib":["es2015", "es2016.array.include", "dom"]
"lib":["es2015", "es2016.array.include", "dom"],
"incremental": true,
"tsBuildInfoFile": "./tsDist/.tsbuildinfo"
},
"exclude": ["./node_modules/*"],
"include": [
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19 changes: 14 additions & 5 deletions webpack.config.js
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Expand Up @@ -102,10 +102,19 @@ var config = {
publicPath: '/',
},

// Enable webpack persistent caching for faster rebuilds
cache: {
type: 'filesystem',
cacheDirectory: path.resolve(__dirname, '.webpack-cache'),
buildDependencies: {
config: [__filename],
},
},

optimization: {
minimizer: [
new TerserPlugin({
parallel: false,
parallel: true,
}),
],
},
Expand Down Expand Up @@ -212,8 +221,7 @@ var config = {
{
loader: 'ts-loader',
options: {
transpileOnly:
isDev || isTest || process.env.NETLIFY,
transpileOnly: true,
},
},
],
Expand Down Expand Up @@ -469,8 +477,6 @@ if (isDev || isTest) {
'shared/Empty.tsx'
);

config.plugins.push(new ForkTsCheckerWebpackPlugin());

// css modules for any scss matching test
config.module.rules.push({
test: /\.module\.scss$/,
Expand Down Expand Up @@ -564,6 +570,9 @@ if (isDev || isTest) {
});
}

// Add ForkTsCheckerWebpackPlugin for all builds since we use transpileOnly
config.plugins.push(new ForkTsCheckerWebpackPlugin());

// reduce logging to optimize netlify build
if (process.env.BUILD_REPORT_ERRORS_ONLY === 'true') {
config.stats = 'errors-only';
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