diff --git a/lib/builder/webpack/utils/perf-loader.js b/lib/builder/webpack/utils/perf-loader.js
index ed7ba6c3df..20c5db4533 100644
--- a/lib/builder/webpack/utils/perf-loader.js
+++ b/lib/builder/webpack/utils/perf-loader.js
@@ -24,10 +24,6 @@ export default class PerfLoader {
   }
 
   warmup() {
-    if (!this.options.build.parallel) {
-      return
-    }
-
     threadLoader.warmup(this.workerPools.js, ['babel-loader', 'babel-preset-env'])
     threadLoader.warmup(this.workerPools.css, ['css-loader'])
   }