Merge pull request #27052 from storybookjs/norbert/lower-cpu-usage-ci

Build: Max of 5 concurrent tasks on CI

scripts/utils/concurrency.ts

@@ -2,6 +2,9 @@ import os from 'os';
 
 /**
  * The maximum number of concurrent tasks we want to have on some CLI and CI tasks.
- * The amount of CPUS minus one, arbitrary limited to 15 to not overload CI executors.
+ * The amount of CPUS minus one, arbitrary limited to 5 to not overload CI executors.
  */
-export const maxConcurrentTasks = Math.min(Math.max(1, os.cpus().length - 1), 15);
+export const maxConcurrentTasks = Math.min(
+  Math.max(1, os.cpus().length - 1),
+  process.env.CI ? 5 : 15
+);