Performance: optimize dropdown filtering

src-ui/src/app/components/common/input/tags/tags.component.ts

@@ -61,12 +61,15 @@ export class TagsComponent implements OnInit, ControlValueAccessor {
   writeValue(newValue: number[]): void {
     this.value = newValue
   }
+
   registerOnChange(fn: any): void {
     this.onChange = fn
   }
+
   registerOnTouched(fn: any): void {
     this.onTouched = fn
   }
+
   setDisabledState?(isDisabled: boolean): void {
     this.disabled = isDisabled
   }
@@ -74,6 +77,7 @@ export class TagsComponent implements OnInit, ControlValueAccessor {
   ngOnInit(): void {
     this.tagService.listAll().subscribe((result) => {
       this.tags = result.results
+      this.tagSearchTextCache.clear()
     })
   }
 
@@ -113,15 +117,12 @@ export class TagsComponent implements OnInit, ControlValueAccessor {
 
   tags: Tag[] = []
 
+  private readonly tagSearchTextCache = new Map<number, string>()
+
   public createTagRef: (name) => void
 
   public searchFn = (term: string, tag: Tag): boolean =>
-    matchesSearchText(
-      [this.getParentChain(tag?.id).map((parent) => parent.name), tag?.name]
-        .flat()
-        .join(' '),
-      term
-    )
+    matchesSearchText(this.getTagSearchText(tag), term)
 
   getTag(id: number) {
     if (this.tags) {
@@ -152,8 +153,8 @@ export class TagsComponent implements OnInit, ControlValueAccessor {
 
   private removeChildren(tagIDs: number[], tag: Tag) {
     if (tag.children?.length) {
-      const childIDs = tag.children.map((child) => child.id)
-      tagIDs = tagIDs.filter((id) => !childIDs.includes(id))
+      const childIDs = new Set(tag.children.map((child) => child.id))
+      tagIDs = tagIDs.filter((id) => !childIDs.has(id))
       for (const child of tag.children) {
         tagIDs = this.removeChildren(tagIDs, child)
       }
@@ -188,6 +189,7 @@ export class TagsComponent implements OnInit, ControlValueAccessor {
         tap((newTag) => {
           this.tagService.listAll().subscribe((tags) => {
             this.tags = tags.results
+            this.tagSearchTextCache.clear()
             add && this.addTag(newTag.id)
           })
         })
@@ -238,4 +240,22 @@ export class TagsComponent implements OnInit, ControlValueAccessor {
     }
     return chain
   }
+
+  private getTagSearchText(tag: Tag): string {
+    if (!tag) {
+      return ''
+    }
+
+    const cachedSearchText = this.tagSearchTextCache.get(tag.id)
+    if (cachedSearchText !== undefined) {
+      return cachedSearchText
+    }
+
+    const searchText = [
+      ...this.getParentChain(tag.id).map((parent) => parent.name),
+      tag.name,
+    ].join(' ')
+    this.tagSearchTextCache.set(tag.id, searchText)
+    return searchText
+  }
 }

src-ui/src/app/pipes/filter.pipe.spec.ts

@@ -46,4 +46,23 @@ describe('FilterPipe', () => {
     itemsReturned = pipe.transform(items, 'slug', 'slug')
     expect(itemsReturned).toEqual([items[0]])
   })
+
+  it('should filter matchingmodel items by normalized independent terms', () => {
+    const pipe = new FilterPipe()
+    const items: MatchingModel[] = [
+      {
+        id: 1,
+        name: 'Financ\u00e9 Taxes 2026',
+        slug: 'finance-taxes',
+      },
+      {
+        id: 2,
+        name: 'Receipt Archive 2026',
+        slug: 'receipt-archive',
+      },
+    ]
+
+    expect(pipe.transform(items, 'finance 26')).toEqual([items[0]])
+    expect(pipe.transform(items, 'finance receipt')).toEqual([])
+  })
 })

src-ui/src/app/utils/text-search.ts

@@ -8,8 +8,39 @@ export type SearchTextValue =
   | null
   | undefined
 
+const normalizedStringCache = new Map<string, string>()
+const searchTermsCache = new Map<string, string[]>()
+
+function normalizeString(value: string): string {
+  const cachedValue = normalizedStringCache.get(value)
+  if (cachedValue !== undefined) {
+    return cachedValue
+  }
+
+  const normalizedValue = normalizeSync(value).toLocaleLowerCase()
+  normalizedStringCache.set(value, normalizedValue)
+  return normalizedValue
+}
+
 export function normalizeSearchText(value: SearchTextValue): string {
-  return normalizeSync(String(value ?? '')).toLocaleLowerCase()
+  return normalizeString(String(value ?? ''))
+}
+
+function getSearchTerms(searchText: SearchTextValue): string[] {
+  const normalizedSearchText = normalizeSearchText(searchText).trim()
+
+  if (!normalizedSearchText) {
+    return []
+  }
+
+  const cachedTerms = searchTermsCache.get(normalizedSearchText)
+  if (cachedTerms !== undefined) {
+    return cachedTerms
+  }
+
+  const searchTerms = normalizedSearchText.split(/\s+/)
+  searchTermsCache.set(normalizedSearchText, searchTerms)
+  return searchTerms
 }
 
 export function matchesSearchText(
@@ -17,7 +48,7 @@ export function matchesSearchText(
   searchText: SearchTextValue
 ): boolean {
   const normalizedValue = normalizeSearchText(value)
-  const searchTerms = normalizeSearchText(searchText).trim().split(/\s+/)
+  const searchTerms = getSearchTerms(searchText)
 
   return searchTerms.every((term) => normalizedValue.includes(term))
 }