Spin UI is becoming unresponsive if we click on pipeline configuration (

#97)

packages/core/src/pipeline/config/services/PipelineConfigService.ts

@@ -165,16 +165,22 @@ export class PipelineConfigService {
     if (!map || !stage) {
       return [];
     }
-    let downstreamStages: Array<string | number> = [];
-
-    const children = map.get(stage);
-    if (children && children.length) {
-      downstreamStages = downstreamStages.concat(children);
-      children.forEach((child) => {
-        downstreamStages = downstreamStages.concat(PipelineConfigService.getDownstreamStageIds(map, child));
-      });
+    const downstreamStages = new Set<string | number>();
+    const pipeStages = [stage];
+
+    while (pipeStages.length > 0) {
+      const currentStage = pipeStages.pop();
+      const children = currentStage ? map.get(currentStage) : null;
+      if (children) {
+        for (const child of children) {
+          if (!downstreamStages.has(child)) {
+            downstreamStages.add(child);
+            pipeStages.push(child);
+          }
+        }
+      }
     }
-    return uniq(downstreamStages);
+    return Array.from(downstreamStages);
   }
 
   public static getDependencyCandidateStages(pipeline: IPipeline, stage: IStage): IStage[] {