diff --git a/src/activitypub/mocks.js b/src/activitypub/mocks.js
index 25a8a45dd1..793bf9d8fd 100644
--- a/src/activitypub/mocks.js
+++ b/src/activitypub/mocks.js
@@ -748,11 +748,11 @@ Mocks.notes.public = async (post) => {
 	if (isArticle) {
 		// Preview is not adopted by anybody, so is left commented-out for now
 		// preview = {
-		// 	type: 'Note',
-		// 	attributedTo: `${nconf.get('url')}/uid/${post.user.uid}`,
-		// 	content: post.content,
-		// 	published,
-		// 	attachment,
+		// type: 'Note',
+		// attributedTo: `${nconf.get('url')}/uid/${post.user.uid}`,
+		// content: post.content,
+		// published,
+		// attachment,
 		// };
 
 		const breakString = '[...]';
diff --git a/src/activitypub/notes.js b/src/activitypub/notes.js
index b34490dea0..727bdc14c2 100644
--- a/src/activitypub/notes.js
+++ b/src/activitypub/notes.js
@@ -786,7 +786,7 @@ async function pruneCidTids(cid, cuttoff) {
 	winston.info(`[notes/prune] ${tidsWithNoEngagement.length} topics eligible in cid:${cid} for pruning`);
 
 	await batch.processArray(tidsWithNoEngagement, async (tids) => {
-		await Promise.all(tids.map(async tid => await topics.purgePostsAndTopic(tid, 0)));
+		await topics.purgePostsAndTopic(tids, 0);
 	}, { batch: 100 });
 }
 
diff --git a/src/categories/data.js b/src/categories/data.js
index 4f9afa7932..943aaa6a7d 100644
--- a/src/categories/data.js
+++ b/src/categories/data.js
@@ -87,11 +87,21 @@ module.exports = function (Categories) {
 	};
 
 	Categories.setCategoryField = async function (cid, field, value) {
-		await db.setObjectField(`${utils.isNumber(cid) ? 'category' : 'categoryRemote'}:${cid}`, field, value);
+		await db.setObjectField(
+			utils.isNumber(cid) ? `category:${cid}` : `categoryRemote:${cid}`,
+			field, value
+		);
+	};
+
+	Categories.setCategoryFields = async function (cid, fields) {
+		await db.setObject(
+			utils.isNumber(cid) ? `category:${cid}` : `categoryRemote:${cid}`,
+			fields
+		);
 	};
 
 	Categories.incrementCategoryFieldBy = async function (cid, field, value) {
-		await db.incrObjectFieldBy(`${utils.isNumber(cid) ? 'category' : 'categoryRemote'}:${cid}`, field, value);
+		await db.incrObjectFieldBy(utils.isNumber(cid) ? `category:${cid}` : `categoryRemote:${cid}`, field, value);
 	};
 };
 
diff --git a/src/categories/delete.js b/src/categories/delete.js
index 243b310106..3074cf3f55 100644
--- a/src/categories/delete.js
+++ b/src/categories/delete.js
@@ -1,6 +1,5 @@
 'use strict';
 
-const async = require('async');
 const db = require('../database');
 const batch = require('../batch');
 const plugins = require('../plugins');
@@ -14,17 +13,14 @@ const utils = require('../utils');
 module.exports = function (Categories) {
 	Categories.purge = async function (cid, uid) {
 		await batch.processSortedSet(`cid:${cid}:tids`, async (tids) => {
-			await async.eachLimit(tids, 10, async (tid) => {
-				await topics.purgePostsAndTopic(tid, uid);
-			});
+			await topics.purgePostsAndTopic(tids, uid);
 			await db.sortedSetRemove(`cid:${cid}:tids`, tids);
 		}, { alwaysStartAt: 0 });
 
 		const pinnedTids = await db.getSortedSetRevRange(`cid:${cid}:tids:pinned`, 0, -1);
-		await async.eachLimit(pinnedTids, 10, async (tid) => {
-			await topics.purgePostsAndTopic(tid, uid);
-		});
+		await topics.purgePostsAndTopic(pinnedTids, uid);
 		await db.sortedSetRemove(`cid:${cid}:tids:pinned`, pinnedTids);
+
 		const categoryData = await Categories.getCategoryData(cid);
 		await purgeCategory(cid, categoryData);
 		plugins.hooks.fire('action:category.delete', { cid: cid, uid: uid, category: categoryData });
diff --git a/src/categories/topics.js b/src/categories/topics.js
index d7cf16c061..3abbfe7566 100644
--- a/src/categories/topics.js
+++ b/src/categories/topics.js
@@ -198,13 +198,15 @@ module.exports = function (Categories) {
 
 	Categories.onTopicsMoved = async (cids) => {
 		await Promise.all(cids.map(async (cid) => {
+			const [topicCount, postCount] = await db.sortedSetsCard([
+				`cid:${cid}:tids:lastposttime`,
+				`cid:${cid}:pids`,
+			]);
 			await Promise.all([
-				Categories.setCategoryField(
-					cid, 'topic_count', await db.sortedSetCard(`cid:${cid}:tids:lastposttime`)
-				),
-				Categories.setCategoryField(
-					cid, 'post_count', await db.sortedSetCard(`cid:${cid}:pids`)
-				),
+				Categories.setCategoryFields(cid, {
+					topic_count: topicCount,
+					post_count: postCount,
+				}),
 				Categories.updateRecentTidForCid(cid),
 			]);
 		}));
diff --git a/src/plugins/hooks.js b/src/plugins/hooks.js
index cdd30951f1..b3ef8188f1 100644
--- a/src/plugins/hooks.js
+++ b/src/plugins/hooks.js
@@ -13,6 +13,11 @@ Hooks._deprecated = new Map([
 		since: 'v4.0.0',
 		until: 'v5.0.0',
 	}], */
+	['action:topic.purge', {
+		new: 'action:topics.purge',
+		since: 'v4.9.0',
+		until: 'v5.0.0',
+	}],
 ]);
 
 Hooks.internals = {
diff --git a/src/posts/delete.js b/src/posts/delete.js
index 4fde39d59a..c4be1b6eb7 100644
--- a/src/posts/delete.js
+++ b/src/posts/delete.js
@@ -108,9 +108,12 @@ module.exports = function (Posts) {
 		const localCount = postData.filter(p => utils.isNumber(p.pid)).length;
 		const incrObjectBulk = [['global', { postCount: -localCount }]];
 
-		const postsByCategory = _.groupBy(postData, p => parseInt(p.cid, 10));
+		const postsByCategory = _.groupBy(postData, p => String(p.cid));
 		for (const [cid, posts] of Object.entries(postsByCategory)) {
-			incrObjectBulk.push([`category:${cid}`, { post_count: -posts.length }]);
+			incrObjectBulk.push([
+				utils.isNumber(cid) ? `category:${cid}` : `categoryRemote:${cid}`,
+				{ post_count: -posts.length },
+			]);
 		}
 
 		const postsByTopic = _.groupBy(postData, p => String(p.tid));
diff --git a/src/topics/crossposts.js b/src/topics/crossposts.js
index 2ed7193f5a..3afc4c3137 100644
--- a/src/topics/crossposts.js
+++ b/src/topics/crossposts.js
@@ -1,5 +1,6 @@
 'use strict';
 
+const winston = require('winston');
 const _ = require('lodash');
 const db = require('../database');
 const topics = require('.');
@@ -117,8 +118,10 @@ Crossposts.add = async function (tid, cid, uid) {
 
 Crossposts.remove = async function (tid, cid, uid) {
 	let crossposts = await Crossposts.get(tid);
-	const isPrivileged = await user.isAdminOrGlobalMod(uid);
-	const isMod = await user.isModerator(uid, cid);
+	const [isPrivileged, isMod] = await Promise.all([
+		user.isAdminOrGlobalMod(uid),
+		user.isModerator(uid, cid),
+	]);
 	const crosspostId = crossposts.reduce((id, { id: _id, cid: _cid, uid: _uid }) => {
 		if (String(cid) === String(_cid) && (isPrivileged || isMod || String(uid) === String(_uid))) {
 			id = _id;
@@ -156,18 +159,24 @@ Crossposts.remove = async function (tid, cid, uid) {
 
 	topics.events.find(tid, { uid, toCid: cid, type: 'crosspost' }).then((eventIds) => {
 		topics.events.purge(tid, eventIds);
-	});
+	}).catch(err => winston.error(err));
 
 	crossposts = await Crossposts.get(tid);
 	return crossposts;
 };
 
-Crossposts.removeAll = async function (tid) {
-	const crosspostIds = await db.getSortedSetMembers(`tid:${tid}:crossposts`);
-	const crossposts = await db.getObjects(crosspostIds.map(id => `crosspost:${id}`));
-	await Promise.all(crossposts.map(async ({ tid, cid, uid }) => {
-		return Crossposts.remove(tid, cid, uid);
-	}));
+Crossposts.removeAll = async function (tids) {
+	if (!Array.isArray(tids)) {
+		tids = [tids];
+	}
+	const allCrosspostIds = (await db.getSortedSetsMembers(
+		tids.map(tid => `tid:${tid}:crossposts`)
+	)).flat();
+	const crossposts = (await db.getObjects(
+		allCrosspostIds.map(id => `crosspost:${id}`)
+	)).filter(Boolean);
 
-	return [];
+	await Promise.all(
+		crossposts.map(({ tid, cid, uid }) => Crossposts.remove(tid, cid, uid))
+	);
 };
\ No newline at end of file
diff --git a/src/topics/delete.js b/src/topics/delete.js
index f86ef5a2b4..6df951c0eb 100644
--- a/src/topics/delete.js
+++ b/src/topics/delete.js
@@ -1,7 +1,8 @@
 'use strict';
 
-const db = require('../database');
+const _ = require('lodash');
 
+const db = require('../database');
 const user = require('../user');
 const posts = require('../posts');
 const categories = require('../categories');
@@ -62,90 +63,189 @@ module.exports = function (Topics) {
 		await categories.updateRecentTidForCid(cid);
 	};
 
-	Topics.purgePostsAndTopic = async function (tid, uid) {
-		const mainPid = await Topics.getTopicField(tid, 'mainPid');
-		await batch.processSortedSet(`tid:${tid}:posts`, async (pids) => {
-			await posts.purge(pids, uid);
-			await db.sortedSetRemove(`tid:${tid}:posts`, pids); // Guard against infinite loop if pid already does not exist in db
-		}, { alwaysStartAt: 0, batch: 500 });
-		await posts.purge(mainPid, uid);
-		await Topics.purge(tid, uid);
+	Topics.purgePostsAndTopic = async function (tids, uid) {
+		if (!Array.isArray(tids)) {
+			tids = [tids];
+		}
+		let topicData = await Topics.getTopicsFields(tids, ['tid', 'mainPid']);
+		topicData = topicData.filter(t => t && t.tid);
+		const tidsToDelete = topicData.map(t => t.tid);
+
+		await Promise.all(tidsToDelete.map(async (tid) => {
+			await batch.processSortedSet(`tid:${tid}:posts`, async (pids) => {
+				await posts.purge(pids, uid);
+				await db.sortedSetRemove(`tid:${tid}:posts`, pids); // Guard against infinite loop if pid already does not exist in db
+			}, { alwaysStartAt: 0, batch: 500 });
+		}));
+
+		await posts.purge(topicData.map(t => t.mainPid), uid);
+		await Topics.purge(tidsToDelete, uid);
 	};
 
-	Topics.purge = async function (tid, uid) {
-		const deletedTopic = await Topics.getTopicData(tid);
-		if (!deletedTopic) {
+	Topics.purge = async function (tids, uid) {
+		if (!Array.isArray(tids)) {
+			tids = [tids];
+		}
+		const deletedTopics = (await Topics.getTopicsData(tids)).filter(Boolean);
+		if (!deletedTopics.length) {
 			return;
 		}
-		deletedTopic.tags = deletedTopic.tags.map(tag => tag.value);
-		await deleteFromFollowersIgnorers(tid);
+		const tidsToDelete = deletedTopics.map(t => t.tid);
+		deletedTopics.forEach((t) => {
+			t.tags = t.tags.map(tag => tag.value);
+		});
+
+		await deleteFromFollowersIgnorers(tidsToDelete);
+
+		const remoteTids = [];
+		const localTids = [];
+
+		for (const tid of tidsToDelete) {
+			if (utils.isNumber(tid)) {
+				localTids.push(tid);
+			} else {
+				remoteTids.push(tid);
+			}
+		}
 
 		await Promise.all([
-			db.deleteAll([
-				`tid:${tid}:followers`,
-				`tid:${tid}:ignorers`,
-				`tid:${tid}:posts`,
-				`tid:${tid}:posts:votes`,
-				`tid:${tid}:bookmarks`,
-				`tid:${tid}:posters`,
-			]),
+			deleteKeys(tidsToDelete),
 			db.sortedSetsRemove([
-				utils.isNumber(tid) ? 'topics:tid' : 'topicsRemote:tid',
 				'topics:recent',
 				'topics:scheduled',
-			], tid),
-			db.sortedSetsRemove(['views', 'posts', 'votes'].map(prop => `${utils.isNumber(tid) ? 'topics' : 'topicsRemote'}:${prop}`), tid),
-			deleteTopicFromCategoryAndUser(tid),
-			Topics.deleteTopicTags(tid),
-			Topics.events.purge(tid),
-			Topics.thumbs.deleteAll(tid),
-			Topics.crossposts.removeAll(tid),
-			reduceCounters(tid),
+			], tidsToDelete),
+			db.sortedSetsRemove([
+				'topics:tid',
+				'topics:views',
+				'topics:posts',
+				'topics:votes',
+			], localTids),
+			db.sortedSetsRemove([
+				'topicsRemote:tid',
+				'topicsRemote:views',
+				'topicsRemote:posts',
+				'topicsRemote:votes',
+			], remoteTids),
+			deleteTopicsFromCategoryAndUser(deletedTopics),
+			deleteFromTags(deletedTopics),
+			Topics.events.purge(tidsToDelete),
+			Topics.crossposts.removeAll(tidsToDelete),
+
+			reduceCounters(deletedTopics),
 		]);
-		plugins.hooks.fire('action:topic.purge', { topic: deletedTopic, uid: uid });
-		await db.delete(`topic:${tid}`);
+
+		// DEPRECATED hook
+		deletedTopics.forEach((topic) => {
+			plugins.hooks.fire('action:topic.purge', { topic, uid });
+		});
+
+		// new hook
+		plugins.hooks.fire('action:topics.purge', { topics: deletedTopics, uid });
+
+		await db.deleteAll(tids.map(tid => `topic:${tid}`));
 	};
 
-	async function deleteFromFollowersIgnorers(tid) {
+	async function deleteFromFollowersIgnorers(tids) {
 		const [followers, ignorers] = await Promise.all([
-			db.getSetMembers(`tid:${tid}:followers`),
-			db.getSetMembers(`tid:${tid}:ignorers`),
+			db.getSetsMembers(tids.map(tid => `tid:${tid}:followers`)),
+			db.getSetsMembers(tids.map(tid => `tid:${tid}:ignorers`)),
 		]);
-		const followerKeys = followers.map(uid => `uid:${uid}:followed_tids`);
-		const ignorerKeys = ignorers.map(uid => `uid:${uid}ignored_tids`);
-		await db.sortedSetsRemove(followerKeys.concat(ignorerKeys), tid);
+		const bulkRemove = [];
+		tids.forEach((tid, index) => {
+			followers[index].forEach((uid) => {
+				bulkRemove.push([`uid:${uid}:followed_tids`, tid]);
+			});
+			ignorers[index].forEach((uid) => {
+				bulkRemove.push([`uid:${uid}:followed_tids`, tid]);
+			});
+		});
+		await db.sortedSetRemoveBulk(bulkRemove);
 	}
 
-	async function deleteTopicFromCategoryAndUser(tid) {
-		const topicData = await Topics.getTopicFields(tid, ['cid', 'uid']);
-		await Promise.all([
-			db.sortedSetsRemove([
-				`cid:${topicData.cid}:tids`,
-				`cid:${topicData.cid}:tids:pinned`,
-				`cid:${topicData.cid}:tids:create`,
-				`cid:${topicData.cid}:tids:posts`,
-				`cid:${topicData.cid}:tids:lastposttime`,
-				`cid:${topicData.cid}:tids:votes`,
-				`cid:${topicData.cid}:tids:views`,
-				`cid:${topicData.cid}:recent_tids`,
-				`cid:${topicData.cid}:uid:${topicData.uid}:tids`,
-				`uid:${topicData.uid}:topics`,
-			], tid),
-			user.decrementUserFieldBy(topicData.uid, 'topiccount', 1),
+	async function deleteKeys(tids) {
+		await db.deleteAll([
+			...tids.map(tid => `tid:${tid}:followers`),
+			...tids.map(tid => `tid:${tid}:ignorers`),
+			...tids.map(tid => `tid:${tid}:posts`),
+			...tids.map(tid => `tid:${tid}:posts:votes`),
+			...tids.map(tid => `tid:${tid}:bookmarks`),
+			...tids.map(tid => `tid:${tid}:posters`),
 		]);
-		await categories.updateRecentTidForCid(topicData.cid);
 	}
 
-	async function reduceCounters(tid) {
-		const incr = -1;
-		const { cid, postcount } = await Topics.getTopicFields(tid, ['cid', 'postcount']);
-		const postCountChange = incr * postcount;
-		const categoryKey = `${utils.isNumber(cid) ? 'category' : 'categoryRemote'}:${cid}`;
-		const bulkIncr = [
-			[categoryKey, { post_count: postCountChange, topic_count: incr }],
-		];
-		if (utils.isNumber(tid)) {
-			bulkIncr.push(['global', { postCount: postCountChange, topicCount: incr }]);
+	async function deleteTopicsFromCategoryAndUser(topicsData) {
+		const bulkRemove = [];
+		for (const topic of topicsData) {
+			bulkRemove.push([`cid:${topic.cid}:tids`, topic.tid]);
+			bulkRemove.push([`cid:${topic.cid}:tids:pinned`, topic.tid]);
+			bulkRemove.push([`cid:${topic.cid}:tids:create`, topic.tid]);
+			bulkRemove.push([`cid:${topic.cid}:tids:posts`, topic.tid]);
+			bulkRemove.push([`cid:${topic.cid}:tids:lastposttime`, topic.tid]);
+			bulkRemove.push([`cid:${topic.cid}:tids:votes`, topic.tid]);
+			bulkRemove.push([`cid:${topic.cid}:tids:views`, topic.tid]);
+			bulkRemove.push([`cid:${topic.cid}:recent_tids`, topic.tid]);
+			bulkRemove.push([`cid:${topic.cid}:uid:${topic.uid}:tids`, topic.tid]);
+			bulkRemove.push([`uid:${topic.uid}:topics`, topic.tid]);
+		}
+		await db.sortedSetRemoveBulk(bulkRemove);
+		const uniqCids = new Set();
+		const uniqUids = new Set();
+		topicsData.forEach((t) => {
+			uniqCids.add(String(t.cid));
+			uniqUids.add(String(t.uid));
+		});
+
+		await user.updateTopicCount(Array.from(uniqUids));
+		await Promise.all(Array.from(uniqCids).map(cid => categories.updateRecentTidForCid(cid)));
+	}
+
+	async function deleteFromTags(topicsData) {
+		const bulkRemove = [];
+		const uniqCids = new Set();
+		const uniqTags = new Set();
+		for (const topic of topicsData) {
+			for (const tag of topic.tags) {
+				bulkRemove.push([`tag:${tag}:topics`, topic.tid]);
+				bulkRemove.push([`cid:${topic.cid}:tag:${tag}:topics`, topic.tid]);
+				uniqTags.add(tag);
+			}
+			uniqCids.add(String(topic.cid));
+		}
+		await db.sortedSetRemoveBulk(bulkRemove);
+
+		await Topics.updateCategoryTagsCount(
+			Array.from(uniqCids),
+			Array.from(uniqTags)
+		);
+		await Topics.updateTagCount(uniqTags);
+	}
+
+	async function reduceCounters(topicsData) {
+		const bulkIncr = [];
+		let globalPostCountChange = 0;
+		let globalTopicCountChange = 0;
+
+		const topicsByCid = _.groupBy(topicsData, t => String(t.cid));
+		for (const [cid, topics] of Object.entries(topicsByCid)) {
+			const cidPostCountChange = Math.max(0, topics.reduce((acc, t) => acc + t.postcount, 0));
+			const categoryKey = `${utils.isNumber(cid) ? 'category' : 'categoryRemote'}:${cid}`;
+
+			bulkIncr.push([
+				categoryKey, { post_count: -cidPostCountChange, topic_count: -topics.length },
+			]);
+
+			for (const topic of topics) {
+				if (utils.isNumber(topic.tid)) {
+					globalPostCountChange += topic.postcount;
+					globalTopicCountChange += 1;
+				}
+			}
+		}
+
+		if (globalPostCountChange || globalTopicCountChange) {
+			bulkIncr.push([
+				'global', { postCount: -globalPostCountChange, topicCount: -globalTopicCountChange },
+			]);
 		}
 		await db.incrObjectFieldByBulk(bulkIncr);
 	}
diff --git a/src/topics/events.js b/src/topics/events.js
index 59284dc84a..82bb7931ad 100644
--- a/src/topics/events.js
+++ b/src/topics/events.js
@@ -272,7 +272,11 @@ Events.log = async (tid, payload) => {
 };
 
 Events.purge = async (tid, eventIds = []) => {
-	if (eventIds.length) {
+	const isArray = Array.isArray(tid);
+	if (isArray && !tid.length) {
+		return;
+	}
+	if (eventIds.length && !isArray) {
 		const isTopicEvent = await db.isSortedSetMembers(`topic:${tid}:events`, eventIds);
 		eventIds = eventIds.filter((id, index) => isTopicEvent[index]);
 		await Promise.all([
@@ -280,8 +284,11 @@ Events.purge = async (tid, eventIds = []) => {
 			db.deleteAll(eventIds.map(id => `topicEvent:${id}`)),
 		]);
 	} else {
-		const keys = [`topic:${tid}:events`];
-		const eventIds = await db.getSortedSetRange(keys[0], 0, -1);
+		if (!isArray) {
+			tid = [tid];
+		}
+		const keys = tid.map(tid => `topic:${tid}:events`);
+		const eventIds = await db.getSortedSetRange(keys, 0, -1);
 		keys.push(...eventIds.map(id => `topicEvent:${id}`));
 
 		await db.deleteAll(keys);
diff --git a/src/topics/tags.js b/src/topics/tags.js
index 3cbc29a801..7f60096cd1 100644
--- a/src/topics/tags.js
+++ b/src/topics/tags.js
@@ -29,7 +29,7 @@ module.exports = function (Topics) {
 		);
 		await db.sortedSetsAdd(topicSets, timestamp, tid);
 		await Topics.updateCategoryTagsCount([cid], tags);
-		await Promise.all(tags.map(updateTagCount));
+		await updateTagCount(tags);
 	};
 
 	Topics.filterTags = async function (tags, cid) {
@@ -185,11 +185,21 @@ module.exports = function (Topics) {
 		await Topics.updateCategoryTagsCount(Object.keys(allCids), [newTagName]);
 	}
 
-	async function updateTagCount(tag) {
-		const count = await Topics.getTagTopicCount(tag);
-		await db.sortedSetAdd('tags:topic:count', count || 0, tag);
+	async function updateTagCount(tags) {
+		if (!Array.isArray(tags)) {
+			tags = [tags];
+		}
+		if (!tags.length) return;
+
+		const counts = await Promise.all(tags.map(tag => Topics.getTagTopicCount(tag)));
+		await db.sortedSetAdd(
+			'tags:topic:count',
+			tags.map((tag, index) => counts[index] || 0),
+			tags
+		);
 		cache.del('tags:topic:count');
 	}
+	Topics.updateTagCount = updateTagCount;
 
 	Topics.getTagTids = async function (tag, start, stop) {
 		const tids = await db.getSortedSetRevRange(`tag:${tag}:topics`, start, stop);
@@ -381,7 +391,7 @@ module.exports = function (Topics) {
 			db.setObjectBulk(bulkSet),
 		]);
 
-		await Promise.all(tags.map(updateTagCount));
+		await updateTagCount(tags);
 		await Topics.updateCategoryTagsCount(_.uniq(topicData.map(t => t.cid)), tags);
 	};
 
@@ -406,7 +416,7 @@ module.exports = function (Topics) {
 			db.setObjectBulk(bulkSet),
 		]);
 
-		await Promise.all(tags.map(updateTagCount));
+		await updateTagCount(tags);
 		await Topics.updateCategoryTagsCount(_.uniq(topicData.map(t => t.cid)), tags);
 	};
 
@@ -430,7 +440,7 @@ module.exports = function (Topics) {
 		await db.sortedSetsRemove(sets, tid);
 
 		await Topics.updateCategoryTagsCount([cid], tags);
-		await Promise.all(tags.map(updateTagCount));
+		await updateTagCount(tags);
 	};
 
 	Topics.searchTags = async function (data) {
diff --git a/src/user/delete.js b/src/user/delete.js
index 65d8ccea65..17ae717490 100644
--- a/src/user/delete.js
+++ b/src/user/delete.js
@@ -49,9 +49,7 @@ module.exports = function (User) {
 
 	async function deleteTopics(callerUid, uid) {
 		await batch.processSortedSet(`uid:${uid}:topics`, async (tids) => {
-			await async.eachSeries(tids, async (tid) => {
-				await topics.purge(tid, callerUid);
-			});
+			await topics.purge(tids, callerUid);
 			await db.sortedSetRemove(`uid:${uid}:topics`, tids);
 		}, { alwaysStartAt: 0, batch: 100 });
 	}
diff --git a/src/user/posts.js b/src/user/posts.js
index 2d027cd226..30ddeaadfc 100644
--- a/src/user/posts.js
+++ b/src/user/posts.js
@@ -111,12 +111,26 @@ module.exports = function (User) {
 		if (uids.length) {
 			const counts = await db.sortedSetsCard(uids.map(uid => `uid:${uid}:posts`));
 			await Promise.all([
-				db.setObjectBulk(uids.map((uid, index) => ([`user${activitypub.helpers.isUri(uid) ? 'Remote' : ''}:${uid}`, { postcount: counts[index] }]))),
+				db.setObjectBulk(
+					uids.map((uid, index) => ([activitypub.helpers.isUri(uid) ? `userRemote:${uid}` : `user:${uid}`, { postcount: counts[index] }]))
+				),
 				db.sortedSetAdd('users:postcount', counts, uids),
 			]);
 		}
 	};
 
+	User.updateTopicCount = async (uids) => {
+		uids = Array.isArray(uids) ? uids : [uids];
+		const exists = await User.exists(uids);
+		uids = uids.filter((uid, index) => exists[index]);
+		if (uids.length) {
+			const counts = await db.sortedSetsCard(uids.map(uid => `uid:${uid}:topics`));
+			await db.setObjectBulk(
+				uids.map((uid, index) => ([activitypub.helpers.isUri(uid) ? `userRemote:${uid}` : `user:${uid}`, { topiccount: counts[index] }]))
+			);
+		}
+	};
+
 	User.incrementUserPostCountBy = async function (uid, value) {
 		return await incrementUserFieldAndSetBy(uid, 'postcount', 'users:postcount', value);
 	};
diff --git a/test/topics.js b/test/topics.js
index f4318b77cb..21ecffd245 100644
--- a/test/topics.js
+++ b/test/topics.js
@@ -2342,7 +2342,7 @@ describe('Topic\'s', () => {
 		});
 
 		it('should create a scheduled topic as pinned, deleted, included in "topics:scheduled" zset and with a timestamp in future', async () => {
-			topicData = (await topics.post(topic)).topicData;
+			topicData = (await topics.post({ ...topic })).topicData;
 			topicData = await topics.getTopicData(topicData.tid);
 
 			assert(topicData.pinned);
@@ -2499,7 +2499,7 @@ describe('Topic\'s', () => {
 		});
 
 		it('should allow to purge a scheduled topic', async () => {
-			topicData = (await topics.post(topic)).topicData;
+			const { topicData } = await topics.post({ ...topic });
 			const { response } = await request.delete(`${nconf.get('url')}/api/v3/topics/${topicData.tid}`, adminApiOpts);
 			assert.strictEqual(response.statusCode, 200);
 		});