Field: Fix perf regression in getUniqueFieldName() (#81323)

Co-authored-by: nmarrs <nathanielmarrs@gmail.com>
(cherry picked from commit 0530021396)

packages/grafana-data/src/field/fieldState.ts

@@ -1,5 +1,3 @@
-import { isEqual } from 'lodash';
-
 import { DataFrame, Field, TIME_SERIES_VALUE_FIELD_NAME, FieldType, TIME_SERIES_TIME_FIELD_NAME } from '../types';
 import { formatLabels } from '../utils/labels';
 
@@ -167,7 +165,7 @@ export function getUniqueFieldName(field: Field, frame?: DataFrame) {
     for (let i = 0; i < frame.fields.length; i++) {
       const otherField = frame.fields[i];
 
-      if (isEqual(field, otherField)) {
+      if (field === otherField) {
         foundSelf = true;
 
         if (dupeCount > 0) {

public/app/features/visualization/data-hover/DataHoverView.tsx

@@ -38,9 +38,8 @@ export function getDisplayValuesAndLinks(
   sortOrder?: SortOrder,
   mode?: TooltipDisplayMode | null
 ) {
-  const fields = data.fields.map((f, idx) => {
-    return { ...f, hovered: idx === columnIndex };
-  });
+  const fields = data.fields;
+  const hoveredField = columnIndex != null ? fields[columnIndex] : null;
 
   const visibleFields = fields.filter((f) => !Boolean(f.config.custom?.hideFrom?.tooltip));
   const traceIDField = visibleFields.find((field) => field.name === 'traceID') || fields[0];
@@ -60,7 +59,7 @@ export function getDisplayValuesAndLinks(
   const linkLookup = new Set<string>();
 
   for (const field of orderedVisibleFields) {
-    if (mode === TooltipDisplayMode.Single && columnIndex != null && !field.hovered) {
+    if (mode === TooltipDisplayMode.Single && field !== hoveredField) {
       continue;
     }
 
@@ -77,14 +76,11 @@ export function getDisplayValuesAndLinks(
       });
     }
 
-    // Sanitize field by removing hovered property to fix unique display name issue
-    const { hovered, ...sanitizedField } = field;
-
     displayValues.push({
-      name: getFieldDisplayName(sanitizedField, data),
+      name: getFieldDisplayName(field, data),
       value,
       valueString: formattedValueToString(fieldDisplay),
-      highlight: field.hovered,
+      highlight: field === hoveredField,
     });
   }