perf: filter out referentially equal diffs before diffId calculation

Author: CountRedClaw

src/components/compare/compare.operations.ts

@@ -29,6 +29,7 @@ import {
   calculateTotalImpactedSummary,
   comparePairedDocs,
   createPairOperationsMap,
+  extractDiffs,
   getUniqueApiTypesFromVersions,
 } from './compare.utils'
 import {
@@ -142,7 +143,8 @@ async function compareCurrentApiType(
   const pairedDocs = await calculatePairedDocs(operationPairs, pairContext)
   const [operationChanges, tags] = await comparePairedDocs(operationsMap, pairedDocs, apiBuilder, pairContext)
 
-  const dedupedChanges = removeObjectDuplicates(operationChanges.flatMap(({ diffs }) => diffs), calculateDiffId)
+  const allDiffs = extractDiffs(operationChanges)
+  const dedupedChanges = removeObjectDuplicates(allDiffs, calculateDiffId)
   const changesSummary = calculateChangeSummary(dedupedChanges)
   const numberOfImpactedOperations = calculateTotalImpactedSummary(
     operationChanges.map(({ impactedSummary }) => impactedSummary),

src/components/compare/compare.utils.ts

@@ -258,3 +258,7 @@ export function createOperationChange(
     ...previousOperationFields,
   }
 }
+
+export function extractDiffs(operationChanges: OperationChanges[]): Diff[] {
+  return Array.from(new Set(operationChanges.flatMap(({ diffs }) => diffs)))
+}