Store dependencies of predicates

extensions/ql-vscode/src/log-insights/log-summary.ts

@@ -29,6 +29,7 @@ interface SummaryEventBase {
 
 interface ResultEventBase extends SummaryEventBase {
   resultSize: number;
+  dependencies?: { [key: string]: string };
 }
 
 export interface ComputeSimple extends ResultEventBase {
@@ -67,7 +68,6 @@ export interface NamedLocal extends ResultEventBase {
   ra: Ra;
   pipelineRuns: PipelineRun[];
   queryCausingWork?: string;
-  dependencies: { [key: string]: string };
   predicateIterationMillis: number[];
 }
 

extensions/ql-vscode/src/log-insights/performance-comparison.ts

@@ -56,6 +56,9 @@ export interface PerformanceComparisonDataFromLog {
    * All the pipeline runs seen for the `i`th predicate from the `names` array.
    */
   pipelineSummaryList: Array<Record<string, PipelineSummary>>;
+
+  /** All dependencies of the `i`th predicate from the `names` array, encoded as a list of indices in `names`. */
+  dependencyLists: number[][];
 }
 
 export class PerformanceOverviewScanner implements EvaluationLogScanner {
@@ -157,8 +160,10 @@ export class PerformanceOverviewScanner implements EvaluationLogScanner {
           iterationCounts,
           evaluationCounts,
           pipelineSummaryList,
+          dependencyLists,
         } = this.data;
         const pipelineSummaries = pipelineSummaryList[index];
+        const dependencyList = dependencyLists[index];
         for (const { counts, raReference } of event.pipelineRuns ?? []) {
           // Get or create the pipeline summary for this RA
           const pipelineSummary = (pipelineSummaries[raReference] ??= {
@@ -178,6 +183,12 @@ export class PerformanceOverviewScanner implements EvaluationLogScanner {
             totalTuplesPerStep[i] += count;
           }
         }
+        for (const dependencyHash of Object.values(event.dependencies ?? {})) {
+          const dependencyIndex = this.raToIndex.get(dependencyHash);
+          if (dependencyIndex != null) {
+            dependencyList.push(dependencyIndex);
+          }
+        }
         timeCosts[index] += totalTime;
         tupleCosts[index] += totalTuples;
         iterationCounts[index] += event.pipelineRuns?.length ?? 0;