perf: move PouchDB/IndexedDB operations to a Web Worker

All database reads and writes now run off the main thread via a
dedicated worker, eliminating IndexedDB overhead from the frame budget.

- Create data.worker.ts exposing the Data class via Comlink
- Refactor data.ts to export a Comlink-wrapped proxy and a standalone
  generateId() pure function (workers can't expose sync methods cleanly)
- Update all 10 call sites to import generateId directly instead of
  calling data.generateId()

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/data/data.ts

@@ -1,166 +1,31 @@
+import { wrap } from "comlink"
 import { nanoid } from "nanoid"
-import indexedDb from "pouchdb-adapter-indexeddb"
-import PouchDb from "pouchdb-browser"
 
 import { DataType } from "./DataType.enum"
 import { Model } from "./models/Model"
 
-PouchDb.plugin(indexedDb)
-
-interface GetAllParams {
-  prefix?: string
-  includeDocs?: boolean
-  includeAttachments?: boolean
-  keys?: string[]
-}
-
-class Data {
-  // oxlint-disable-next-line typescript/ban-types
-  private readonly locale: PouchDB.Database<{}> | null = null
-
-  constructor() {
-    try {
-      this.locale = new PouchDb("remanso", {
-        adapter: "indexeddb"
-      })
-    } catch (error) {
-      console.warn("data error", error)
-    }
-  }
-
-  public async add<DT extends DataType>(model: Model<DT>): Promise<boolean> {
-    try {
-      const result = await this.locale?.put(model)
-      return result?.ok ?? false
-    } catch (error) {
-      console.warn(error)
-
-      return false
-    }
-  }
-
-  public async update<DT extends DataType, T extends Model<DT>>(
-    model: T
-  ): Promise<boolean> {
-    try {
-      if (!model._id) {
-        const result = await this.locale?.put(model)
-        return result?.ok ?? false
-      }
-
-      const oldModel = await this.get(model._id)
-      if (oldModel) {
-        const result = await this.locale?.put({ ...oldModel, ...model })
-        return result?.ok ?? false
-      }
-
-      const result = await this.locale?.put(model)
-      return result?.ok ?? false
-    } catch (error) {
-      console.warn(error)
-
-      return false
-    }
-  }
-
-  public async remove(id: string): Promise<boolean> {
-    try {
-      const doc = await this.get(id)
-      if (!doc) {
-        return false
-      }
-      const result = await this.locale?.put({
-        ...doc,
-        _deleted: true
-      })
-      return result?.ok ?? false
-    } catch {
-      return false
-    }
-  }
-
-  public async get<DT extends DataType, T extends Model<DT>>(
-    id: string
-  ): Promise<T | null> {
-    try {
-      return ((await this.locale?.get(id)) as T) || null
-    } catch {
-      return null
-    }
-  }
-
-  public async getOrCreate<DT extends DataType, T extends Model<DT>>(
+export interface DataApi {
+  add<DT extends DataType>(model: Model<DT>): Promise<boolean>
+  update<DT extends DataType, T extends Model<DT>>(model: T): Promise<boolean>
+  remove(id: string): Promise<boolean>
+  get<DT extends DataType, T extends Model<DT>>(id: string): Promise<T | null>
+  getOrCreate<DT extends DataType, T extends Model<DT>>(
     id: string,
     initialValue: T
-  ): Promise<T> {
-    const element = await this.get<DT, T>(id)
-
-    if (element) {
-      return element
-    }
-
-    await data.add<DT>({ ...initialValue, _id: id })
-
-    return this.getOrCreate(id, initialValue)
-  }
-
-  public async getAll<DT extends DataType, T extends Model<DT>>({
-    prefix,
-    includeDocs = true,
-    includeAttachments = false,
-    keys = []
-  }: GetAllParams): Promise<T[]> {
-    if (!this.locale) {
-      return []
-    }
-
-    if (keys.length) {
-      const response = await this.locale.allDocs({
-        include_docs: includeDocs,
-        attachments: includeAttachments,
-        keys: keys.map((key) => this.generateId(prefix, key))
-      })
-
-      if (includeDocs) {
-        return response.rows
-          .map((row) => {
-            if ("error" in row) {
-              return null
-            }
-
-            return row.doc
-          })
-          .filter(Boolean) as T[]
-      } else {
-        return response.rows
-          .map((row) => {
-            if ("error" in row) {
-              return null
-            }
-
-            return { _id: row.id }
-          })
-          .filter(Boolean) as T[]
-      }
-    }
-
-    const response = await this.locale.allDocs({
-      include_docs: includeDocs,
-      attachments: includeAttachments,
-      startkey: prefix ? prefix : undefined,
-      endkey: prefix ? `${prefix}\ufff0` : undefined
-    })
-
-    return response.rows.map((row) => row.doc) as T[]
-  }
-
-  public generateId(type?: DataType | string, id?: string) {
-    if (!type) {
-      return id || nanoid()
-    }
-
-    return `${type}-${id || nanoid()}`
-  }
+  ): Promise<T>
+  getAll<DT extends DataType, T extends Model<DT>>(params: {
+    prefix?: string
+    includeDocs?: boolean
+    includeAttachments?: boolean
+    keys?: string[]
+  }): Promise<T[]>
 }
 
-export const data = new Data()
+export const generateId = (type?: DataType | string, id?: string): string => {
+  if (!type) return id || nanoid()
+  return `${type}-${id || nanoid()}`
+}
+
+import DataWorker from "./data.worker?worker"
+
+export const data = wrap(new DataWorker()) as unknown as DataApi

src/data/data.worker.ts

@@ -0,0 +1,156 @@
+import { expose } from "comlink"
+import { nanoid } from "nanoid"
+import indexedDb from "pouchdb-adapter-indexeddb"
+import PouchDb from "pouchdb-browser"
+
+import { DataType } from "./DataType.enum"
+import { Model } from "./models/Model"
+
+PouchDb.plugin(indexedDb)
+
+interface GetAllParams {
+  prefix?: string
+  includeDocs?: boolean
+  includeAttachments?: boolean
+  keys?: string[]
+}
+
+class Data {
+  // oxlint-disable-next-line typescript/ban-types
+  private readonly locale: PouchDB.Database<{}> | null = null
+
+  constructor() {
+    try {
+      this.locale = new PouchDb("remanso", {
+        adapter: "indexeddb"
+      })
+    } catch (error) {
+      console.warn("data error", error)
+    }
+  }
+
+  private buildId(type?: DataType | string, id?: string): string {
+    if (!type) return id || nanoid()
+    return `${type}-${id || nanoid()}`
+  }
+
+  public async add<DT extends DataType>(model: Model<DT>): Promise<boolean> {
+    try {
+      const result = await this.locale?.put(model)
+      return result?.ok ?? false
+    } catch (error) {
+      console.warn(error)
+      return false
+    }
+  }
+
+  public async update<DT extends DataType, T extends Model<DT>>(
+    model: T
+  ): Promise<boolean> {
+    try {
+      if (!model._id) {
+        const result = await this.locale?.put(model)
+        return result?.ok ?? false
+      }
+
+      const oldModel = await this.get(model._id)
+      if (oldModel) {
+        const result = await this.locale?.put({ ...oldModel, ...model })
+        return result?.ok ?? false
+      }
+
+      const result = await this.locale?.put(model)
+      return result?.ok ?? false
+    } catch (error) {
+      console.warn(error)
+      return false
+    }
+  }
+
+  public async remove(id: string): Promise<boolean> {
+    try {
+      const doc = await this.get(id)
+      if (!doc) {
+        return false
+      }
+      const result = await this.locale?.put({
+        ...doc,
+        _deleted: true
+      })
+      return result?.ok ?? false
+    } catch {
+      return false
+    }
+  }
+
+  public async get<DT extends DataType, T extends Model<DT>>(
+    id: string
+  ): Promise<T | null> {
+    try {
+      return ((await this.locale?.get(id)) as T) || null
+    } catch {
+      return null
+    }
+  }
+
+  public async getOrCreate<DT extends DataType, T extends Model<DT>>(
+    id: string,
+    initialValue: T
+  ): Promise<T> {
+    const element = await this.get<DT, T>(id)
+
+    if (element) {
+      return element
+    }
+
+    await this.add<DT>({ ...initialValue, _id: id })
+
+    return this.getOrCreate(id, initialValue)
+  }
+
+  public async getAll<DT extends DataType, T extends Model<DT>>({
+    prefix,
+    includeDocs = true,
+    includeAttachments = false,
+    keys = []
+  }: GetAllParams): Promise<T[]> {
+    if (!this.locale) {
+      return []
+    }
+
+    if (keys.length) {
+      const response = await this.locale.allDocs({
+        include_docs: includeDocs,
+        attachments: includeAttachments,
+        keys: keys.map((key) => this.buildId(prefix, key))
+      })
+
+      if (includeDocs) {
+        return response.rows
+          .map((row) => {
+            if ("error" in row) return null
+            return row.doc
+          })
+          .filter(Boolean) as T[]
+      } else {
+        return response.rows
+          .map((row) => {
+            if ("error" in row) return null
+            return { _id: row.id }
+          })
+          .filter(Boolean) as T[]
+      }
+    }
+
+    const response = await this.locale.allDocs({
+      include_docs: includeDocs,
+      attachments: includeAttachments,
+      startkey: prefix ? prefix : undefined,
+      endkey: prefix ? `${prefix}\ufff0` : undefined
+    })
+
+    return response.rows.map((row) => row.doc) as T[]
+  }
+}
+
+expose(new Data())

src/hooks/useBacklinks.hook.ts

@@ -2,7 +2,7 @@ import { useAsyncState } from "@vueuse/core"
 import { ComputedRef, onUnmounted, toValue } from "vue"
 
 import { backlinkEventBus } from "@/bus/backlinkEventBus"
-import { data } from "@/data/data"
+import { data, generateId } from "@/data/data"
 import { DataType } from "@/data/DataType.enum"
 import { BacklinkNote } from "@/modules/note/models/BacklinkNote"
 
@@ -11,7 +11,7 @@ export const useBacklinks = (sha: string | ComputedRef<string>) => {
 
   const { state: backlink, execute } = useAsyncState(
     data.get<DataType.BacklinkNote, BacklinkNote>(
-      data.generateId(DataType.BacklinkNote, sha)
+      generateId(DataType.BacklinkNote, sha)
     ),
     null,
     {

src/hooks/useComputeBacklinks.hook.ts

@@ -1,7 +1,7 @@
 import { watch } from "vue"
 
 import { backlinkEventBus } from "@/bus/backlinkEventBus"
-import { data } from "@/data/data"
+import { data, generateId } from "@/data/data"
 import { DataType } from "@/data/DataType.enum"
 import { useFile } from "@/hooks/useFile.hook"
 import { Backlink } from "@/modules/note/models/Backlink"
@@ -42,7 +42,7 @@ export const useComputeBacklinks = () => {
           continue
         }
 
-        const fileBacklinkId = data.generateId(DataType.BacklinkNote, file.sha)
+        const fileBacklinkId = generateId(DataType.BacklinkNote, file.sha)
         const fileBacklink = await data.get<DataType.BacklinkNote, BacklinkNote>(
           fileBacklinkId
         )
@@ -102,7 +102,7 @@ export const useComputeBacklinks = () => {
       }
 
       for (const [sha, fileBacklinks] of backlinks) {
-        const fileBacklinkId = data.generateId(DataType.BacklinkNote, sha)
+        const fileBacklinkId = generateId(DataType.BacklinkNote, sha)
         const backlinkNote: BacklinkNote = {
           _id: fileBacklinkId,
           $type: DataType.BacklinkNote,

src/hooks/useOfflineNotes.hook.ts

@@ -1,7 +1,7 @@
 import { useAsyncState } from "@vueuse/core"
 import { computed, ref } from "vue"
 
-import { data } from "@/data/data"
+import { data, generateId } from "@/data/data"
 import { DataType } from "@/data/DataType.enum"
 import { prepareNoteCache } from "@/modules/note/cache/prepareNoteCache"
 import { Note } from "@/modules/note/models/Note"
@@ -36,7 +36,7 @@ export const useOfflineNotes = () => {
 
       if (
         !file.sha ||
-        cachedNotesSet.has(data.generateId(DataType.Note, file.sha))
+        cachedNotesSet.has(generateId(DataType.Note, file.sha))
       ) {
         continue
       }

src/modules/card/hooks/useSpacedRepetitionCards.ts

@@ -4,7 +4,7 @@ import { useAsyncState } from "@vueuse/core"
 import { addDays, isAfter } from "date-fns"
 import { computed, nextTick, watch } from "vue"
 
-import { data } from "@/data/data"
+import { data, generateId } from "@/data/data"
 import { DataType } from "@/data/DataType.enum"
 import { useFile } from "@/hooks/useFile.hook"
 import { useLinks } from "@/hooks/useLinks.hook"
@@ -51,7 +51,7 @@ export const useSpacedRepetitionCards = () => {
         const repetition = await data.getOrCreate<
           DataType.RepetitionCard,
           RepetitionCard
-        >(data.generateId(DataType.RepetitionCard, cardFile.path), {
+        >(generateId(DataType.RepetitionCard, cardFile.path), {
           $type: DataType.RepetitionCard,
           level: 1,
           repeatDate: new Date(),

src/modules/history/hooks/useLastVisitedRepos.hook.ts

@@ -1,17 +1,17 @@
 import { useAsyncState } from "@vueuse/core"
 import { computed } from "vue"
 
-import { data } from "@/data/data"
+import { data, generateId } from "@/data/data"
 import { DataType } from "@/data/DataType.enum"
 import { History } from "@/data/models/History"
 
-const HISTORY_ID = data.generateId(DataType.History, "history")
+const HISTORY_ID = generateId(DataType.History, "history")
 
 export const useLastVisitedRepos = () => {
   const history = useAsyncState(
     () =>
       data.get<DataType.History, History>(
-        data.generateId(DataType.History, "history")
+        generateId(DataType.History, "history")
       ),
     null
   )

src/modules/history/hooks/useVisitRepo.hook.ts

@@ -1,10 +1,10 @@
 import { Ref, toValue } from "vue"
 
-import { data } from "@/data/data"
+import { data, generateId } from "@/data/data"
 import { DataType } from "@/data/DataType.enum"
 import { History } from "@/data/models/History"
 
-const HISTORY_ID = data.generateId(DataType.History, "history")
+const HISTORY_ID = generateId(DataType.History, "history")
 const MAX_REPO_HISTORY = 10
 
 export const useVisitRepo = (newRepo: {

src/modules/note/cache/prepareNoteCache.ts

@@ -1,4 +1,4 @@
-import { data } from "@/data/data"
+import { data, generateId } from "@/data/data"
 import { DataType } from "@/data/DataType.enum"
 import { Note } from "@/modules/note/models/Note"
 import { useUserRepoStore } from "@/modules/repo/store/userRepo.store"
@@ -14,8 +14,8 @@ type NoteCacheResult =
 export const prepareNoteCache = (sha: string, path?: string) => {
   const store = useUserRepoStore()
 
-  const noteId = data.generateId(DataType.Note, sha)
-  const notePath = path ? data.generateId(DataType.Note, path) : null
+  const noteId = generateId(DataType.Note, sha)
+  const notePath = path ? generateId(DataType.Note, path) : null
   const getCachedNote = async (): Promise<NoteCacheResult> => {
     const note = await data.get<DataType.Note, Note>(noteId)
 

src/modules/repo/hooks/useFavoriteRepos.hook.ts

@@ -1,6 +1,6 @@
 import { computed, onMounted, ref } from "vue"
 
-import { data } from "@/data/data"
+import { data, generateId } from "@/data/data"
 import { DataType } from "@/data/DataType.enum"
 import { useRepos } from "@/hooks/useRepos.hook"
 import { RepoBase } from "@/modules/repo/interfaces/RepoBase"
@@ -27,7 +27,7 @@ export const useFavoriteRepos = () => {
 
   const toggleFavorite = async (repo: RepoBase, isFavorite: boolean) => {
     const favorite: FavoriteRepo = {
-      _id: data.generateId(DataType.FavoriteRepo, repo.id),
+      _id: generateId(DataType.FavoriteRepo, repo.id),
       $type: DataType.FavoriteRepo,
       isFavorite,
       name: repo.name,

src/modules/repo/store/userRepo.store.ts

@@ -1,6 +1,6 @@
 import { defineStore } from "pinia"
 
-import { data } from "@/data/data"
+import { data, generateId } from "@/data/data"
 import { DataType } from "@/data/DataType.enum"
 import { RepoFile } from "@/modules/repo/interfaces/RepoFile"
 import { UserSettings } from "@/modules/repo/interfaces/UserSettings"
@@ -39,7 +39,7 @@ export const useUserRepoStore = defineStore("USER_REPO_STATE", {
       this.user = user
       this.repo = repo
 
-      const savedRepoId = data.generateId(DataType.SavedRepo, `${user}-${repo}`)
+      const savedRepoId = generateId(DataType.SavedRepo, `${user}-${repo}`)
       const userSettingsId = `UserSetting-${user}-${repo}`
 
       const [cachedSavedRepo, cachedUserSettings] = await Promise.all([
@@ -131,7 +131,7 @@ export const useUserRepoStore = defineStore("USER_REPO_STATE", {
         return
       }
 
-      const savedRepoId = data.generateId(
+      const savedRepoId = generateId(
         DataType.SavedRepo,
         `${this.user}-${this.repo}`
       )

src/modules/user/service/signIn.ts

@@ -1,7 +1,7 @@
 import { Octokit } from "@octokit/rest"
 import { addMinutes, addSeconds, isBefore } from "date-fns"
 
-import { data } from "@/data/data"
+import { data, generateId } from "@/data/data"
 import { DataType } from "@/data/DataType.enum"
 import { GithubAccessToken } from "@/data/models/GithubAccessToken"
 import { GithubToken } from "@/modules/user/interfaces/GithubToken"
@@ -26,7 +26,7 @@ export const needToRefreshToken = async () => {
   const accessToken = await data.get<
     DataType.GithubAccessToken,
     GithubAccessToken
-  >(data.generateId(DataType.GithubAccessToken, personalTokenId))
+  >(generateId(DataType.GithubAccessToken, personalTokenId))
 
   if (!accessToken) {
     return false
@@ -42,7 +42,7 @@ export const refreshToken = async () => {
   const accessToken = await data.get<
     DataType.GithubAccessToken,
     GithubAccessToken
-  >(data.generateId(DataType.GithubAccessToken, personalTokenId))
+  >(generateId(DataType.GithubAccessToken, personalTokenId))
 
   if (!accessToken) {
     return null
@@ -74,7 +74,7 @@ export const getAccessToken = async () => {
   const response = await data.get<
     DataType.GithubAccessToken,
     GithubAccessToken
-  >(data.generateId(DataType.GithubAccessToken, personalTokenId))
+  >(generateId(DataType.GithubAccessToken, personalTokenId))
 
   return response
 }
@@ -94,7 +94,7 @@ export const saveAccessToken = async (githubToken: GithubToken) => {
 
   const accessToken: GithubAccessToken = {
     ...actualPAT,
-    _id: data.generateId(DataType.GithubAccessToken, personalTokenId),
+    _id: generateId(DataType.GithubAccessToken, personalTokenId),
     $type: DataType.GithubAccessToken,
     token: githubToken.access_token,
     expiresIn: githubToken.expires_in,