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[7.6] chore(NA): removes use of parallel option in the terser minimizer (#57077) #57145

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merged 2 commits into from
Feb 8, 2020
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[7.6] chore(NA): removes use of parallel option in the terser minimizer (#57077) #57145

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b70e02d
chore(NA): removes use of parallel option in the terser minimizer (#5…
mistic Feb 7, 2020
93b83a4
Merge branch '7.6' into backport/7.6/pr-57077
elasticmachine Feb 8, 2020
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2 changes: 1 addition & 1 deletion src/optimize/base_optimizer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -439,7 +439,7 @@ export default class BaseOptimizer {
optimization: {
minimizer: [
new TerserPlugin({
parallel: this.getThreadLoaderPoolConfig().workers,
parallel: false,
sourceMap: false,
cache: false,
extractComments: false,
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16 changes: 10 additions & 6 deletions src/optimize/dynamic_dll_plugin/dll_config_model.js
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Expand Up @@ -214,16 +214,20 @@ function common(config) {
return webpackMerge(generateDLL(config));
}

function optimized(config) {
function optimized() {
return webpackMerge({
mode: 'production',
optimization: {
minimizer: [
new TerserPlugin({
// Apply the same logic used to calculate the
// threadLoaderPool workers number to spawn
// the parallel processes on terser
parallel: config.threadLoaderPoolConfig.workers,
// NOTE: we should not enable that option for now
// Since 2.0.0 terser-webpack-plugin is using jest-worker
// to run tasks in a pool of workers. Currently it looks like
// is requiring too much memory and break on large entry points
// compilations (like this) one. Also the gain we have enabling
// that option was barely noticed.
// https:/webpack-contrib/terser-webpack-plugin/issues/143
parallel: false,
sourceMap: false,
cache: false,
extractComments: false,
Expand All @@ -250,5 +254,5 @@ export function configModel(rawConfig = {}) {
return webpackMerge(common(config), unoptimized());
}

return webpackMerge(common(config), optimized(config));
return webpackMerge(common(config), optimized());
}