diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index bcf4615..aa164bb 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: denoland/deno:1.38.4
+image: denoland/deno:1.38.5
 
 default:
   interruptible: true
diff --git a/.tool-versions b/.tool-versions
index 1252389..fd4bb2f 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-deno 1.38.4
+deno 1.38.5
\ No newline at end of file
diff --git a/scripts/relays.ts b/scripts/relays.ts
index 94d0afd..84f8a7e 100644
--- a/scripts/relays.ts
+++ b/scripts/relays.ts
@@ -18,6 +18,6 @@ async function sync([url]: string[]) {
   const response = await fetch(url);
   const data = await response.json();
   const values = filteredArray(relaySchema).parse(data) as `wss://${string}`[];
-  await addRelays(values);
+  await addRelays(values, { active: true });
   console.log(`Done: added ${values.length} relays.`);
 }
diff --git a/src/controllers/api/accounts.ts b/src/controllers/api/accounts.ts
index 2896b96..22c9a63 100644
--- a/src/controllers/api/accounts.ts
+++ b/src/controllers/api/accounts.ts
@@ -59,7 +59,7 @@ const createAccountController: AppController = async (c) => {
 const verifyCredentialsController: AppController = async (c) => {
   const pubkey = c.get('pubkey')!;
 
-  const event = await getAuthor(pubkey);
+  const event = await getAuthor(pubkey, { relations: ['author_stats'] });
   if (event) {
     return c.json(await renderAccount(event, { withSource: true }));
   } else {
@@ -138,7 +138,15 @@ const accountStatusesController: AppController = async (c) => {
     return c.json([]);
   }
 
-  const filter: DittoFilter<1> = { authors: [pubkey], kinds: [1], relations: ['author'], since, until, limit };
+  const filter: DittoFilter<1> = {
+    authors: [pubkey],
+    kinds: [1],
+    relations: ['author', 'event_stats', 'author_stats'],
+    since,
+    until,
+    limit,
+  };
+
   if (tagged) {
     filter['#t'] = [tagged];
   }
@@ -257,7 +265,9 @@ const favouritesController: AppController = async (c) => {
     .map((event) => event.tags.find((tag) => tag[0] === 'e')?.[1])
     .filter((id): id is string => !!id);
 
-  const events1 = await mixer.getFilters([{ kinds: [1], ids, relations: ['author'] }], { timeout: Time.seconds(1) });
+  const events1 = await mixer.getFilters([{ kinds: [1], ids, relations: ['author', 'event_stats', 'author_stats'] }], {
+    timeout: Time.seconds(1),
+  });
 
   const statuses = await Promise.all(events1.map((event) => renderStatus(event, c.get('pubkey'))));
   return paginated(c, events1, statuses);
diff --git a/src/controllers/api/search.ts b/src/controllers/api/search.ts
index b0f71ce..e5f1778 100644
--- a/src/controllers/api/search.ts
+++ b/src/controllers/api/search.ts
@@ -69,7 +69,7 @@ function searchEvents({ q, type, limit, account_id }: SearchQuery): Promise<Even
   const filter: DittoFilter = {
     kinds: typeToKinds(type),
     search: q,
-    relations: ['author'],
+    relations: ['author', 'event_stats', 'author_stats'],
     limit,
   };
 
@@ -115,16 +115,20 @@ async function getLookupFilters({ q, type, resolve }: SearchQuery): Promise<Ditt
       const result = nip19.decode(q);
       switch (result.type) {
         case 'npub':
-          if (accounts) filters.push({ kinds: [0], authors: [result.data] });
+          if (accounts) filters.push({ kinds: [0], authors: [result.data], relations: ['author_stats'] });
           break;
         case 'nprofile':
-          if (accounts) filters.push({ kinds: [0], authors: [result.data.pubkey] });
+          if (accounts) filters.push({ kinds: [0], authors: [result.data.pubkey], relations: ['author_stats'] });
           break;
         case 'note':
-          if (statuses) filters.push({ kinds: [1], ids: [result.data] });
+          if (statuses) {
+            filters.push({ kinds: [1], ids: [result.data], relations: ['author', 'event_stats', 'author_stats'] });
+          }
           break;
         case 'nevent':
-          if (statuses) filters.push({ kinds: [1], ids: [result.data.id] });
+          if (statuses) {
+            filters.push({ kinds: [1], ids: [result.data.id], relations: ['author', 'event_stats', 'author_stats'] });
+          }
           break;
       }
     } catch (_e) {
@@ -136,11 +140,11 @@ async function getLookupFilters({ q, type, resolve }: SearchQuery): Promise<Ditt
   } else if (accounts && ACCT_REGEX.test(q)) {
     const pubkey = await lookupNip05Cached(q);
     if (pubkey) {
-      filters.push({ kinds: [0], authors: [pubkey] });
+      filters.push({ kinds: [0], authors: [pubkey], relations: ['author_stats'] });
     }
   }
 
-  return filters.map((filter) => ({ ...filter, relations: ['author'] }));
+  return filters;
 }
 
 export { searchController };
diff --git a/src/controllers/api/statuses.ts b/src/controllers/api/statuses.ts
index 114923d..cf0446a 100644
--- a/src/controllers/api/statuses.ts
+++ b/src/controllers/api/statuses.ts
@@ -29,7 +29,7 @@ const createStatusSchema = z.object({
 const statusController: AppController = async (c) => {
   const id = c.req.param('id');
 
-  const event = await getEvent(id, { kind: 1, relations: ['author'] });
+  const event = await getEvent(id, { kind: 1, relations: ['author', 'event_stats', 'author_stats'] });
   if (event) {
     return c.json(await renderStatus(event, c.get('pubkey')));
   }
@@ -89,7 +89,7 @@ const createStatusController: AppController = async (c) => {
 
 const contextController: AppController = async (c) => {
   const id = c.req.param('id');
-  const event = await getEvent(id, { kind: 1, relations: ['author'] });
+  const event = await getEvent(id, { kind: 1, relations: ['author', 'event_stats', 'author_stats'] });
 
   async function renderStatuses(events: Event<1>[]) {
     const statuses = await Promise.all(events.map((event) => renderStatus(event, c.get('pubkey'))));
@@ -110,7 +110,7 @@ const contextController: AppController = async (c) => {
 
 const favouriteController: AppController = async (c) => {
   const id = c.req.param('id');
-  const target = await getEvent(id, { kind: 1, relations: ['author'] });
+  const target = await getEvent(id, { kind: 1, relations: ['author', 'event_stats', 'author_stats'] });
 
   if (target) {
     await createEvent({
diff --git a/src/controllers/api/timelines.ts b/src/controllers/api/timelines.ts
index d3ffcdc..a29cdc8 100644
--- a/src/controllers/api/timelines.ts
+++ b/src/controllers/api/timelines.ts
@@ -35,7 +35,7 @@ const hashtagTimelineController: AppController = (c) => {
 /** Render statuses for timelines. */
 async function renderStatuses(c: AppContext, filters: DittoFilter<1>[]) {
   const events = await mixer.getFilters(
-    filters.map((filter) => ({ ...filter, relations: ['author'] })),
+    filters.map((filter) => ({ ...filter, relations: ['author', 'event_stats', 'author_stats'] })),
     { timeout: Time.seconds(1) },
   );
 
diff --git a/src/db.ts b/src/db.ts
index a722d4e..4f1a8d9 100644
--- a/src/db.ts
+++ b/src/db.ts
@@ -13,6 +13,22 @@ interface DittoDB {
   users: UserRow;
   relays: RelayRow;
   unattached_media: UnattachedMediaRow;
+  author_stats: AuthorStatsRow;
+  event_stats: EventStatsRow;
+}
+
+interface AuthorStatsRow {
+  pubkey: string;
+  followers_count: number;
+  following_count: number;
+  notes_count: number;
+}
+
+interface EventStatsRow {
+  event_id: string;
+  replies_count: number;
+  reposts_count: number;
+  reactions_count: number;
 }
 
 interface EventRow {
@@ -101,7 +117,7 @@ async function migrate() {
       console.log('Everything up-to-date.');
     } else {
       console.log('Migrations finished!');
-      for (const { migrationName, status } of results.results) {
+      for (const { migrationName, status } of results.results!) {
         console.log(`  - ${migrationName}: ${status}`);
       }
     }
@@ -110,4 +126,4 @@ async function migrate() {
 
 await migrate();
 
-export { db, type DittoDB, type EventRow, type TagRow, type UserRow };
+export { type AuthorStatsRow, db, type DittoDB, type EventRow, type EventStatsRow, type TagRow, type UserRow };
diff --git a/src/db/events.ts b/src/db/events.ts
index b8db69a..2a5f2fd 100644
--- a/src/db/events.ts
+++ b/src/db/events.ts
@@ -80,6 +80,9 @@ type EventQuery = SelectQueryBuilder<DittoDB, 'events', {
   content: string;
   created_at: number;
   sig: string;
+  stats_replies_count?: number;
+  stats_reposts_count?: number;
+  stats_reactions_count?: number;
   author_id?: string;
   author_tags?: string;
   author_kind?: number;
@@ -87,6 +90,9 @@ type EventQuery = SelectQueryBuilder<DittoDB, 'events', {
   author_content?: string;
   author_created_at?: number;
   author_sig?: string;
+  author_stats_followers_count?: number;
+  author_stats_following_count?: number;
+  author_stats_notes_count?: number;
 }>;
 
 /** Build the query for a filter. */
@@ -134,7 +140,7 @@ function getFilterQuery(filter: DittoFilter): EventQuery {
       query = query
         .leftJoin('tags', 'tags.event_id', 'events.id')
         .where('tags.tag', '=', tag)
-        .where('tags.value', 'in', value) as typeof query;
+        .where('tags.value', 'in', value);
     }
   }
 
@@ -165,7 +171,27 @@ function getFilterQuery(filter: DittoFilter): EventQuery {
         'authors.tags as author_tags',
         'authors.created_at as author_created_at',
         'authors.sig as author_sig',
-      ]) as typeof query;
+      ]);
+  }
+
+  if (filter.relations?.includes('author_stats')) {
+    query = query
+      .leftJoin('author_stats', 'author_stats.pubkey', 'events.pubkey')
+      .select((eb) => [
+        eb.fn.coalesce('author_stats.followers_count', eb.val(0)).as('author_stats_followers_count'),
+        eb.fn.coalesce('author_stats.following_count', eb.val(0)).as('author_stats_following_count'),
+        eb.fn.coalesce('author_stats.notes_count', eb.val(0)).as('author_stats_notes_count'),
+      ]);
+  }
+
+  if (filter.relations?.includes('event_stats')) {
+    query = query
+      .leftJoin('event_stats', 'event_stats.event_id', 'events.id')
+      .select((eb) => [
+        eb.fn.coalesce('event_stats.replies_count', eb.val(0)).as('stats_replies_count'),
+        eb.fn.coalesce('event_stats.reposts_count', eb.val(0)).as('stats_reposts_count'),
+        eb.fn.coalesce('event_stats.reactions_count', eb.val(0)).as('stats_reactions_count'),
+      ]);
   }
 
   if (filter.search) {
@@ -184,8 +210,13 @@ function getFiltersQuery(filters: DittoFilter[]) {
     .reduce((result, query) => result.unionAll(query));
 }
 
+type AuthorStats = Omit<DittoDB['author_stats'], 'pubkey'>;
+type EventStats = Omit<DittoDB['event_stats'], 'event_id'>;
+
 interface DittoEvent<K extends number = number> extends Event<K> {
-  author?: Event<0>;
+  author?: DittoEvent<0>;
+  author_stats?: AuthorStats;
+  event_stats?: EventStats;
 }
 
 /** Get events for filters from the database. */
@@ -223,6 +254,22 @@ async function getFilters<K extends number>(
       };
     }
 
+    if (typeof row.author_stats_followers_count === 'number') {
+      event.author_stats = {
+        followers_count: row.author_stats_followers_count,
+        following_count: row.author_stats_following_count!,
+        notes_count: row.author_stats_notes_count!,
+      };
+    }
+
+    if (typeof row.stats_replies_count === 'number') {
+      event.event_stats = {
+        replies_count: row.stats_replies_count,
+        reposts_count: row.stats_reposts_count!,
+        reactions_count: row.stats_reactions_count!,
+      };
+    }
+
     return event;
   });
 }
diff --git a/src/db/migrations/009_add_stats.ts b/src/db/migrations/009_add_stats.ts
new file mode 100644
index 0000000..60d9447
--- /dev/null
+++ b/src/db/migrations/009_add_stats.ts
@@ -0,0 +1,24 @@
+import { Kysely } from '@/deps.ts';
+
+export async function up(db: Kysely<any>): Promise<void> {
+  await db.schema
+    .createTable('author_stats')
+    .addColumn('pubkey', 'text', (col) => col.primaryKey())
+    .addColumn('followers_count', 'integer', (col) => col.notNull().defaultTo(0))
+    .addColumn('following_count', 'integer', (col) => col.notNull().defaultTo(0))
+    .addColumn('notes_count', 'integer', (col) => col.notNull().defaultTo(0))
+    .execute();
+
+  await db.schema
+    .createTable('event_stats')
+    .addColumn('event_id', 'text', (col) => col.primaryKey().references('events.id').onDelete('cascade'))
+    .addColumn('replies_count', 'integer', (col) => col.notNull().defaultTo(0))
+    .addColumn('reposts_count', 'integer', (col) => col.notNull().defaultTo(0))
+    .addColumn('reactions_count', 'integer', (col) => col.notNull().defaultTo(0))
+    .execute();
+}
+
+export async function down(db: Kysely<any>): Promise<void> {
+  await db.schema.dropTable('author_stats').execute();
+  await db.schema.dropTable('event_stats').execute();
+}
diff --git a/src/db/relays.ts b/src/db/relays.ts
index d41948f..836f520 100644
--- a/src/db/relays.ts
+++ b/src/db/relays.ts
@@ -1,14 +1,19 @@
 import { tldts } from '@/deps.ts';
 import { db } from '@/db.ts';
 
+interface AddRelaysOpts {
+  active?: boolean;
+}
+
 /** Inserts relays into the database, skipping duplicates. */
-function addRelays(relays: `wss://${string}`[]) {
+function addRelays(relays: `wss://${string}`[], opts: AddRelaysOpts = {}) {
   if (!relays.length) return Promise.resolve();
+  const { active = false } = opts;
 
   const values = relays.map((url) => ({
     url: new URL(url).toString(),
     domain: tldts.getDomain(url)!,
-    active: true,
+    active,
   }));
 
   return db.insertInto('relays')
diff --git a/src/deps.ts b/src/deps.ts
index f1cedc5..a6b893c 100644
--- a/src/deps.ts
+++ b/src/deps.ts
@@ -63,6 +63,7 @@ export {
   type CompiledQuery,
   FileMigrationProvider,
   type Insertable,
+  type InsertQueryBuilder,
   Kysely,
   Migrator,
   type NullableInsertKeys,
diff --git a/src/filter.ts b/src/filter.ts
index e4e336f..76a0fcd 100644
--- a/src/filter.ts
+++ b/src/filter.ts
@@ -4,7 +4,7 @@ import { type Event, type Filter, matchFilters } from '@/deps.ts';
 import type { EventData } from '@/types.ts';
 
 /** Additional properties that may be added by Ditto to events. */
-type Relation = 'author';
+type Relation = 'author' | 'author_stats' | 'event_stats';
 
 /** Custom filter interface that extends Nostr filters with extra options for Ditto. */
 interface DittoFilter<K extends number = number> extends Filter<K> {
diff --git a/src/pipeline.ts b/src/pipeline.ts
index 9749a9c..4f0c51a 100644
--- a/src/pipeline.ts
+++ b/src/pipeline.ts
@@ -8,6 +8,7 @@ import { isEphemeralKind } from '@/kinds.ts';
 import * as mixer from '@/mixer.ts';
 import { publish } from '@/pool.ts';
 import { isLocallyFollowed } from '@/queries.ts';
+import { updateStats } from '@/stats.ts';
 import { Sub } from '@/subs.ts';
 import { getTagSet } from '@/tags.ts';
 import { eventAge, isRelay, nostrDate, Time } from '@/utils.ts';
@@ -68,7 +69,10 @@ async function storeEvent(event: Event, data: EventData): Promise<void> {
     if (deletion) {
       return Promise.reject(new RelayError('blocked', 'event was deleted'));
     } else {
-      await eventsDB.insertEvent(event, data).catch(console.warn);
+      await Promise.all([
+        eventsDB.insertEvent(event, data).catch(console.warn),
+        updateStats(event).catch(console.warn),
+      ]);
     }
   } else {
     return Promise.reject(new RelayError('blocked', 'only registered users can post'));
diff --git a/src/queries.ts b/src/queries.ts
index de9bd33..edd5f4a 100644
--- a/src/queries.ts
+++ b/src/queries.ts
@@ -27,8 +27,14 @@ const getEvent = async <K extends number = number>(
 };
 
 /** Get a Nostr `set_medatadata` event for a user's pubkey. */
-const getAuthor = async (pubkey: string, timeout = 1000): Promise<Event<0> | undefined> => {
-  const [event] = await mixer.getFilters([{ authors: [pubkey], kinds: [0], limit: 1 }], { limit: 1, timeout });
+const getAuthor = async (pubkey: string, opts: GetEventOpts<0> = {}): Promise<Event<0> | undefined> => {
+  const { relations, timeout = 1000 } = opts;
+
+  const [event] = await mixer.getFilters(
+    [{ authors: [pubkey], relations, kinds: [0], limit: 1 }],
+    { limit: 1, timeout },
+  );
+
   return event;
 };
 
@@ -60,7 +66,7 @@ async function getAncestors(event: Event<1>, result = [] as Event<1>[]): Promise
     const inReplyTo = replyTag ? replyTag[1] : undefined;
 
     if (inReplyTo) {
-      const parentEvent = await getEvent(inReplyTo, { kind: 1, relations: ['author'] });
+      const parentEvent = await getEvent(inReplyTo, { kind: 1, relations: ['author', 'event_stats', 'author_stats'] });
 
       if (parentEvent) {
         result.push(parentEvent);
@@ -73,7 +79,10 @@ async function getAncestors(event: Event<1>, result = [] as Event<1>[]): Promise
 }
 
 function getDescendants(eventId: string): Promise<Event<1>[]> {
-  return mixer.getFilters([{ kinds: [1], '#e': [eventId], relations: ['author'] }], { limit: 200, timeout: 2000 });
+  return mixer.getFilters(
+    [{ kinds: [1], '#e': [eventId], relations: ['author', 'event_stats', 'author_stats'] }],
+    { limit: 200, timeout: 2000 },
+  );
 }
 
 /** Returns whether the pubkey is followed by a local user. */
diff --git a/src/sentry.ts b/src/sentry.ts
index eefe9c5..8a30e3b 100644
--- a/src/sentry.ts
+++ b/src/sentry.ts
@@ -6,6 +6,6 @@ if (Conf.sentryDsn) {
   console.log('Sentry enabled');
   Sentry.init({
     dsn: Conf.sentryDsn,
-    tracesSampleRate: 1.0,
+    tracesSampleRate: .2,
   });
 }
diff --git a/src/stats.ts b/src/stats.ts
new file mode 100644
index 0000000..32208df
--- /dev/null
+++ b/src/stats.ts
@@ -0,0 +1,176 @@
+import { type AuthorStatsRow, db, type DittoDB, type EventStatsRow } from '@/db.ts';
+import * as eventsDB from '@/db/events.ts';
+import { type Event, findReplyTag, type InsertQueryBuilder } from '@/deps.ts';
+
+type AuthorStat = keyof Omit<AuthorStatsRow, 'pubkey'>;
+type EventStat = keyof Omit<EventStatsRow, 'event_id'>;
+
+type AuthorStatDiff = ['author_stats', pubkey: string, stat: AuthorStat, diff: number];
+type EventStatDiff = ['event_stats', eventId: string, stat: EventStat, diff: number];
+type StatDiff = AuthorStatDiff | EventStatDiff;
+
+/** Store stats for the event in LMDB. */
+async function updateStats<K extends number>(event: Event<K>) {
+  let prev: Event<K> | undefined;
+  const queries: InsertQueryBuilder<DittoDB, any, unknown>[] = [];
+
+  // Kind 3 is a special case - replace the count with the new list.
+  if (event.kind === 3) {
+    prev = await maybeGetPrev(event);
+    if (!prev || event.created_at >= prev.created_at) {
+      queries.push(updateFollowingCountQuery(event as Event<3>));
+    }
+  }
+
+  const statDiffs = getStatsDiff(event, prev);
+  const pubkeyDiffs = statDiffs.filter(([table]) => table === 'author_stats') as AuthorStatDiff[];
+  const eventDiffs = statDiffs.filter(([table]) => table === 'event_stats') as EventStatDiff[];
+
+  if (pubkeyDiffs.length) queries.push(authorStatsQuery(pubkeyDiffs));
+  if (eventDiffs.length) queries.push(eventStatsQuery(eventDiffs));
+
+  if (queries.length) {
+    await Promise.all(queries.map((query) => query.execute()));
+  }
+}
+
+/** Calculate stats changes ahead of time so we can build an efficient query. */
+function getStatsDiff<K extends number>(event: Event<K>, prev: Event<K> | undefined): StatDiff[] {
+  const statDiffs: StatDiff[] = [];
+
+  const firstTaggedId = event.tags.find(([name]) => name === 'e')?.[1];
+  const inReplyToId = findReplyTag(event as Event<1>)?.[1];
+
+  switch (event.kind) {
+    case 1:
+      statDiffs.push(['author_stats', event.pubkey, 'notes_count', 1]);
+      if (inReplyToId) {
+        statDiffs.push(['event_stats', inReplyToId, 'replies_count', 1]);
+      }
+      break;
+    case 3:
+      statDiffs.push(...getFollowDiff(event as Event<3>, prev as Event<3> | undefined));
+      break;
+    case 6:
+      if (firstTaggedId) {
+        statDiffs.push(['event_stats', firstTaggedId, 'reposts_count', 1]);
+      }
+      break;
+    case 7:
+      if (firstTaggedId) {
+        statDiffs.push(['event_stats', firstTaggedId, 'reactions_count', 1]);
+      }
+  }
+
+  return statDiffs;
+}
+
+/** Create an author stats query from the list of diffs. */
+function authorStatsQuery(diffs: AuthorStatDiff[]) {
+  const values: AuthorStatsRow[] = diffs.map(([_, pubkey, stat, diff]) => {
+    const row: AuthorStatsRow = {
+      pubkey,
+      followers_count: 0,
+      following_count: 0,
+      notes_count: 0,
+    };
+    row[stat] = diff;
+    return row;
+  });
+
+  return db.insertInto('author_stats')
+    .values(values)
+    .onConflict((oc) =>
+      oc
+        .column('pubkey')
+        .doUpdateSet((eb) => ({
+          followers_count: eb('followers_count', '+', eb.ref('excluded.followers_count')),
+          following_count: eb('following_count', '+', eb.ref('excluded.following_count')),
+          notes_count: eb('notes_count', '+', eb.ref('excluded.notes_count')),
+        }))
+    );
+}
+
+/** Create an event stats query from the list of diffs. */
+function eventStatsQuery(diffs: EventStatDiff[]) {
+  const values: EventStatsRow[] = diffs.map(([_, event_id, stat, diff]) => {
+    const row: EventStatsRow = {
+      event_id,
+      replies_count: 0,
+      reposts_count: 0,
+      reactions_count: 0,
+    };
+    row[stat] = diff;
+    return row;
+  });
+
+  return db.insertInto('event_stats')
+    .values(values)
+    .onConflict((oc) =>
+      oc
+        .column('event_id')
+        .doUpdateSet((eb) => ({
+          replies_count: eb('replies_count', '+', eb.ref('excluded.replies_count')),
+          reposts_count: eb('reposts_count', '+', eb.ref('excluded.reposts_count')),
+          reactions_count: eb('reactions_count', '+', eb.ref('excluded.reactions_count')),
+        }))
+    );
+}
+
+/** Get the last version of the event, if any. */
+async function maybeGetPrev<K extends number>(event: Event<K>): Promise<Event<K>> {
+  const [prev] = await eventsDB.getFilters([
+    { kinds: [event.kind], authors: [event.pubkey], limit: 1 },
+  ]);
+
+  return prev;
+}
+
+/** Set the following count to the total number of unique "p" tags in the follow list. */
+function updateFollowingCountQuery({ pubkey, tags }: Event<3>) {
+  const following_count = new Set(
+    tags
+      .filter(([name]) => name === 'p')
+      .map(([_, value]) => value),
+  ).size;
+
+  return db.insertInto('author_stats')
+    .values({
+      pubkey,
+      following_count,
+      followers_count: 0,
+      notes_count: 0,
+    })
+    .onConflict((oc) =>
+      oc
+        .column('pubkey')
+        .doUpdateSet({ following_count })
+    );
+}
+
+/** Compare the old and new follow events (if any), and return a diff array. */
+function getFollowDiff(event: Event<3>, prev?: Event<3>): AuthorStatDiff[] {
+  const prevTags = prev?.tags ?? [];
+
+  const prevPubkeys = new Set(
+    prevTags
+      .filter(([name]) => name === 'p')
+      .map(([_, value]) => value),
+  );
+
+  const pubkeys = new Set(
+    event.tags
+      .filter(([name]) => name === 'p')
+      .map(([_, value]) => value),
+  );
+
+  const added = [...pubkeys].filter((pubkey) => !prevPubkeys.has(pubkey));
+  const removed = [...prevPubkeys].filter((pubkey) => !pubkeys.has(pubkey));
+
+  return [
+    ...added.map((pubkey): AuthorStatDiff => ['author_stats', pubkey, 'followers_count', 1]),
+    ...removed.map((pubkey): AuthorStatDiff => ['author_stats', pubkey, 'followers_count', -1]),
+  ];
+}
+
+export { updateStats };
diff --git a/src/views.ts b/src/views.ts
index 3049710..2314a84 100644
--- a/src/views.ts
+++ b/src/views.ts
@@ -15,7 +15,7 @@ async function renderEventAccounts(c: AppContext, filters: Filter[]) {
   }
 
   const accounts = await Promise.all([...pubkeys].map(async (pubkey) => {
-    const author = await getAuthor(pubkey);
+    const author = await getAuthor(pubkey, { relations: ['author_stats'] });
     if (author) {
       return renderAccount(author);
     }
diff --git a/src/views/mastodon/accounts.ts b/src/views/mastodon/accounts.ts
index 3a55fb7..bfcd7ef 100644
--- a/src/views/mastodon/accounts.ts
+++ b/src/views/mastodon/accounts.ts
@@ -1,8 +1,7 @@
 import { Conf } from '@/config.ts';
-import * as eventsDB from '@/db/events.ts';
+import { type DittoEvent } from '@/db/events.ts';
 import { findUser } from '@/db/users.ts';
 import { lodash, nip19, type UnsignedEvent } from '@/deps.ts';
-import { getFollowedPubkeys } from '@/queries.ts';
 import { jsonMetaContentSchema } from '@/schemas/nostr.ts';
 import { verifyNip05Cached } from '@/utils/nip05.ts';
 import { Nip05, nostrDate, nostrNow, parseNip05 } from '@/utils.ts';
@@ -12,7 +11,10 @@ interface ToAccountOpts {
   withSource?: boolean;
 }
 
-async function renderAccount(event: UnsignedEvent<0>, opts: ToAccountOpts = {}) {
+async function renderAccount(
+  event: Omit<NonNullable<DittoEvent['author']>, 'id' | 'sig'>,
+  opts: ToAccountOpts = {},
+) {
   const { withSource = false } = opts;
   const { pubkey } = event;
 
@@ -26,12 +28,9 @@ async function renderAccount(event: UnsignedEvent<0>, opts: ToAccountOpts = {})
 
   const npub = nip19.npubEncode(pubkey);
 
-  const [user, parsed05, followersCount, followingCount, statusesCount] = await Promise.all([
+  const [user, parsed05] = await Promise.all([
     findUser({ pubkey }),
     parseAndVerifyNip05(nip05, pubkey),
-    eventsDB.countFilters([{ kinds: [3], '#p': [pubkey] }]),
-    getFollowedPubkeys(pubkey).then((pubkeys) => pubkeys.length),
-    eventsDB.countFilters([{ kinds: [1], authors: [pubkey] }]),
   ]);
 
   return {
@@ -40,14 +39,14 @@ async function renderAccount(event: UnsignedEvent<0>, opts: ToAccountOpts = {})
     avatar: picture,
     avatar_static: picture,
     bot: false,
-    created_at: event ? nostrDate(event.created_at).toISOString() : new Date().toISOString(),
+    created_at: nostrDate(event.created_at).toISOString(),
     discoverable: true,
     display_name: name,
     emojis: renderEmojis(event),
     fields: [],
     follow_requests_count: 0,
-    followers_count: followersCount,
-    following_count: followingCount,
+    followers_count: event.author_stats?.followers_count ?? 0,
+    following_count: event.author_stats?.following_count ?? 0,
     fqn: parsed05?.handle || npub,
     header: banner,
     header_static: banner,
@@ -65,7 +64,7 @@ async function renderAccount(event: UnsignedEvent<0>, opts: ToAccountOpts = {})
         follow_requests_count: 0,
       }
       : undefined,
-    statuses_count: statusesCount,
+    statuses_count: event.author_stats?.notes_count ?? 0,
     url: Conf.local(`/users/${pubkey}`),
     username: parsed05?.nickname || npub.substring(0, 8),
     pleroma: {
diff --git a/src/views/mastodon/statuses.ts b/src/views/mastodon/statuses.ts
index 86bdd13..17b1677 100644
--- a/src/views/mastodon/statuses.ts
+++ b/src/views/mastodon/statuses.ts
@@ -13,7 +13,10 @@ import { DittoAttachment, renderAttachment } from '@/views/mastodon/attachments.
 import { renderEmojis } from '@/views/mastodon/emojis.ts';
 
 async function renderStatus(event: eventsDB.DittoEvent<1>, viewerPubkey?: string) {
-  const account = event.author ? await renderAccount(event.author) : await accountFromPubkey(event.pubkey);
+  const account = event.author
+    ? await renderAccount({ ...event.author, author_stats: event.author_stats })
+    : await accountFromPubkey(event.pubkey);
+
   const replyTag = findReplyTag(event);
 
   const mentionedPubkeys = [
@@ -26,13 +29,10 @@ async function renderStatus(event: eventsDB.DittoEvent<1>, viewerPubkey?: string
 
   const { html, links, firstUrl } = parseNoteContent(event.content);
 
-  const [mentions, card, repliesCount, reblogsCount, favouritesCount, [repostEvent], [reactionEvent]] = await Promise
+  const [mentions, card, [repostEvent], [reactionEvent]] = await Promise
     .all([
       Promise.all(mentionedPubkeys.map(toMention)),
       firstUrl ? unfurlCardCached(firstUrl) : null,
-      eventsDB.countFilters([{ kinds: [1], '#e': [event.id] }]),
-      eventsDB.countFilters([{ kinds: [6], '#e': [event.id] }]),
-      eventsDB.countFilters([{ kinds: [7], '#e': [event.id] }]),
       viewerPubkey
         ? eventsDB.getFilters([{ kinds: [6], '#e': [event.id], authors: [viewerPubkey] }], { limit: 1 })
         : [],
@@ -66,9 +66,9 @@ async function renderStatus(event: eventsDB.DittoEvent<1>, viewerPubkey?: string
     spoiler_text: (cw ? cw[1] : subject?.[1]) || '',
     visibility: 'public',
     language: event.tags.find((tag) => tag[0] === 'lang')?.[1] || null,
-    replies_count: repliesCount,
-    reblogs_count: reblogsCount,
-    favourites_count: favouritesCount,
+    replies_count: event.event_stats?.replies_count ?? 0,
+    reblogs_count: event.event_stats?.reposts_count ?? 0,
+    favourites_count: event.event_stats?.reactions_count ?? 0,
     favourited: reactionEvent?.content === '+',
     reblogged: Boolean(repostEvent),
     muted: false,
@@ -86,8 +86,8 @@ async function renderStatus(event: eventsDB.DittoEvent<1>, viewerPubkey?: string
 }
 
 async function toMention(pubkey: string) {
-  const profile = await getAuthor(pubkey);
-  const account = profile ? await renderAccount(profile) : undefined;
+  const author = await getAuthor(pubkey);
+  const account = author ? await renderAccount(author) : undefined;
 
   if (account) {
     return {