a collection of lightweight TypeScript packages for AT Protocol, the protocol powering Bluesky
atproto
bluesky
typescript
npm
chore(bluesky): new validation benchmarks
+295
-212
+295
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packages/definitions/bluesky/lib/lexicons.bench.ts
+295
-212
packages/definitions/bluesky/lib/lexicons.bench.ts
···
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// realistic validation benchmark using post shapes sampled from the Bluesky firehose
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// distribution (20k sample from Jetstream, 2026-03-18):
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// reply: 32.5% | plain-text: 22.5% | external+link: 6.7% | images: 6.7%
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// external: 6.2% | quote: 3.7% | images+tags: 2.4% | video: 0.7%
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// recordWithMedia: 0.4% | external+labels: 0.1%
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import { is } from '@atcute/lexicons';
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import * as atproto from '@atproto/api';
···
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import * as atcute from './lexicons/index.ts';
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summary(() => {
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bench('atcute', function* () {
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yield {
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[0]() {
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return {
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$type: 'app.bsky.feed.post',
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createdAt: '2024-01-16T02:11:28.664Z',
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embed: {
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$type: 'app.bsky.embed.images',
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images: [
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{
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alt: 'Kit sleeping on me',
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aspectRatio: {
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height: 2000,
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width: 1500,
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},
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image: {
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$type: 'blob',
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ref: {
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$link: 'bafkreieg74vbe3b5xyro3mcflzm2mb5yf525myeu2bgcif35kopii4eh5m',
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},
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mimeType: 'image/jpeg',
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size: 806879,
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},
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},
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],
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function pair(record: object) {
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summary(() => {
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bench('atcute', function* () {
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yield {
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[0]() {
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return structuredClone(record);
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},
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bench(r: any) {
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return do_not_optimize(is(atcute.AppBskyFeedPost.mainSchema, r));
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},
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};
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});
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bench('atproto', function* () {
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yield {
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[0]() {
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return atproto.jsonToLex(structuredClone(record));
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},
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bench(r: any) {
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return do_not_optimize(atproto.AppBskyFeedPost.validateRecord(r));
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},
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};
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});
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});
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}
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// #region plain text (en) — 22.5% of firehose
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pair({
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$type: 'app.bsky.feed.post',
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createdAt: '2026-03-18T10:30:17.175Z',
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langs: ['en'],
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text: "The five constipated men in the Bible? Cain - He wasn't Abel.\nKing David - Heaven and Earth couldn't move him.\nKing Solomon - He sat on the throne for 40 years.\nMoses - He took two tablets and went up on the mountain.\nAnd Noah - He spent 40 days and 40 nights in the Ark, and passed nothing but water",
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});
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// #endregion
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// #region plain text (ja) — CJK grapheme counting, ~19% of posts
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pair({
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$type: 'app.bsky.feed.post',
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createdAt: '2026-03-18T10:30:16.385Z',
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langs: ['ja'],
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text: 'マンゴーかき氷が食べたい。おいしいパイナップルケーキも買いたい。各自一つ火鍋が与えられるらしい火鍋も行きたい。麺線も食べたいです。',
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});
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// #endregion
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// #region reply (en) — 32.5% of firehose
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pair({
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$type: 'app.bsky.feed.post',
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createdAt: '2026-03-18T10:30:16.850Z',
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langs: ['en'],
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reply: {
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parent: {
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cid: 'bafyreieh67kdw2s5kgc2beiv7rgcf6yaryagmvez2q5qc2kzkweprietvm',
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uri: 'at://did:plc:6tmzbiftwxfgnxz6b5t2ylsh/app.bsky.feed.post/3mhbkounjys2m',
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},
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root: {
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cid: 'bafyreieh67kdw2s5kgc2beiv7rgcf6yaryagmvez2q5qc2kzkweprietvm',
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uri: 'at://did:plc:6tmzbiftwxfgnxz6b5t2ylsh/app.bsky.feed.post/3mhbkounjys2m',
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},
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},
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text: "I would've had a breakdown after the first thing, so I can already tell you're stronger than I.",
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});
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// #endregion
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+
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// #region images embed — 6.7%
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pair({
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$type: 'app.bsky.feed.post',
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createdAt: '2026-03-18T10:30:10.415Z',
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embed: {
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$type: 'app.bsky.embed.images',
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images: [
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{
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alt: '',
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aspectRatio: {
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height: 2000,
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width: 1500,
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},
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image: {
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$type: 'blob',
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ref: {
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$link: 'bafkreibjfybaa44yecbited3s6i3swbvh4eebh2z7n3mtwyw3r3lykyjwe',
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},
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langs: ['en'],
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reply: {
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parent: {
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cid: 'bafyreiefj6k42eyvufxz7ux3i2nyzefgpjmavapto7zlcrfhzspe3eijxu',
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uri: 'at://did:plc:34d6gxlllrndltpas55xfedz/app.bsky.feed.post/3kj2ujyplal2i',
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},
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root: {
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cid: 'bafyreihzdxsclc45we52wdy2ui7er7b6rxgh36vpoy6ecnegkujwk6yj5m',
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uri: 'at://did:plc:ragtjsm2j2vknwkz3zp4oxrd/app.bsky.feed.post/3kj2uf2sole2u',
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},
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},
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text: 'angel mode',
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};
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mimeType: 'image/jpeg',
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size: 918219,
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},
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},
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bench(record: any) {
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return do_not_optimize(is(atcute.AppBskyFeedPost.mainSchema, record));
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],
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},
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langs: ['en'],
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text: 'peak doodle',
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});
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// #endregion
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// #region external link + link facet — 6.7%
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pair({
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$type: 'app.bsky.feed.post',
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createdAt: '2026-03-18T10:30:15.152Z',
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embed: {
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$type: 'app.bsky.embed.external',
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external: {
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description: '',
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thumb: {
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$type: 'blob',
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ref: {
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$link: 'bafkreiaax6qmoecxx2h5uh6fhlqi2ejhyandzsozds7s6owa3rqqvvxkgq',
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},
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mimeType: 'image/jpeg',
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size: 30903,
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},
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};
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});
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title: 'paradise 1997',
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uri: 'https://open.spotify.com/track/5tyGDQeYTbqxLHsuAvWvcF?si=0GK1IDV5SHqGWhEcrjJdDg',
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},
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},
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facets: [
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{
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features: [
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{
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$type: 'app.bsky.richtext.facet#link',
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uri: 'https://open.spotify.com/track/5tyGDQeYTbqxLHsuAvWvcF?si=0GK1IDV5SHqGWhEcrjJdDg',
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},
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],
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index: {
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byteEnd: 37,
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byteStart: 5,
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},
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},
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],
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langs: ['en'],
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text: 'mood\nopen.spotify.com/track/5tyGDQ...',
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});
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// #endregion
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// #region quote post (embed.record) — 3.7%
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pair({
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$type: 'app.bsky.feed.post',
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createdAt: '2026-03-18T10:30:16.953Z',
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embed: {
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$type: 'app.bsky.embed.record',
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record: {
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cid: 'bafyreiheczsalzhd36m64swmbsyjmsfxo7xyfxg3gayo4auawejt7hdklq',
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uri: 'at://did:plc:jqxoz37667iqtse4cbv2pge3/app.bsky.feed.post/3mhbf3vrsi22g',
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},
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},
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langs: ['en'],
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text: '"Well, I rode through the desert on a horse with no name..."',
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});
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// #endregion
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bench('atproto', function* () {
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yield {
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[0]() {
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return atproto.jsonToLex({
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$type: 'app.bsky.feed.post',
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createdAt: '2024-01-16T02:11:28.664Z',
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embed: {
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$type: 'app.bsky.embed.images',
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images: [
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{
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alt: 'Kit sleeping on me',
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aspectRatio: {
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height: 2000,
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width: 1500,
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},
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image: {
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$type: 'blob',
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ref: {
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$link: 'bafkreieg74vbe3b5xyro3mcflzm2mb5yf525myeu2bgcif35kopii4eh5m',
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},
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mimeType: 'image/jpeg',
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size: 806879,
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},
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},
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],
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// #region images + tag facets — 2.4%
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pair({
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$type: 'app.bsky.feed.post',
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createdAt: '2026-03-18T10:30:17.690Z',
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embed: {
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$type: 'app.bsky.embed.images',
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images: [
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{
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alt: '',
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aspectRatio: {
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height: 1610,
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width: 2000,
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},
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image: {
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$type: 'blob',
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ref: {
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$link: 'bafkreiabwucd3gnplugjzgunc7g3owz5t2dufzkfj7vwig2xhh77mdcl5m',
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},
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langs: ['en'],
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reply: {
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parent: {
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cid: 'bafyreiefj6k42eyvufxz7ux3i2nyzefgpjmavapto7zlcrfhzspe3eijxu',
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uri: 'at://did:plc:34d6gxlllrndltpas55xfedz/app.bsky.feed.post/3kj2ujyplal2i',
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},
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root: {
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cid: 'bafyreihzdxsclc45we52wdy2ui7er7b6rxgh36vpoy6ecnegkujwk6yj5m',
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uri: 'at://did:plc:ragtjsm2j2vknwkz3zp4oxrd/app.bsky.feed.post/3kj2uf2sole2u',
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},
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},
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text: 'angel mode',
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});
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mimeType: 'image/jpeg',
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size: 424839,
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},
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},
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],
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},
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facets: [
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{
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features: [
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{
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$type: 'app.bsky.richtext.facet#tag',
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tag: '叢雲掲示板',
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},
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],
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index: {
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byteEnd: 16,
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byteStart: 0,
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},
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bench(record: any) {
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return do_not_optimize(atproto.AppBskyFeedPost.validateRecord(record));
197
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},
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],
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langs: ['ja'],
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text: '#叢雲掲示板\nがう',
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});
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// #endregion
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// #region video embed — 0.7%
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pair({
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$type: 'app.bsky.feed.post',
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createdAt: '2026-03-18T10:30:19.713Z',
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embed: {
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$type: 'app.bsky.embed.video',
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aspectRatio: {
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height: 2340,
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width: 1080,
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},
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presentation: 'default',
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video: {
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$type: 'blob',
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ref: {
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$link: 'bafkreigrbgdmc6jlkpnarpgxm5cdnswroqgm6rcsfan7w2sdhpcgin4qd4',
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},
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};
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});
220
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mimeType: 'video/mp4',
221
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size: 446877,
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},
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},
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langs: ['en'],
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text: 'I was looking for the "SNOP" panel in Homestuck and it took me to the revamped mspa site and oh my god...\n\nTHE HAMBURGER MENU ON MOBILE IS A SHITTY JPEG OF A HAMBURGER.',
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});
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// #endregion
101
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summary(() => {
103
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bench('atcute', function* () {
104
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yield {
105
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[0]() {
106
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return {
107
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$type: 'app.bsky.feed.post',
108
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createdAt: '2025-05-13T21:16:55.043Z',
109
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embed: {
110
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$type: 'app.bsky.embed.images',
111
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images: [
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{
113
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alt: 'As explained below, Columbia University has been advised by immigration authorities that YUNSEO CHUNG is now present in the United States and that RANJANI SRINIVASAN was a removable alien and YUNSEO CHUNG is a removable\nalien. Despite this knowledge, Columbia University has refused, and continues to refuse, to permit immigration officers to locate and arrest RANJANI SRINIVASAN and YUNSEO CHUNG at their student housing and were and are thus concealing, harboring, or shielding from detection removable aliens, RANJANI SRINIVASAN and YUNSEO CHUNG, or are\nconspiring to do so.',
114
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aspectRatio: {
115
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height: 658,
116
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width: 1382,
117
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},
118
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image: {
119
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$type: 'blob',
120
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ref: {
121
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$link: 'bafkreievlpk5ra3mcdhcll3dkxnet5cncj4wmo6ofg75tee3wbynfm6dfq',
122
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},
123
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mimeType: 'image/jpeg',
124
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size: 406921,
125
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},
126
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},
127
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],
229
+
// #region record with media — 0.4%, most complex embed type
230
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pair({
231
+
$type: 'app.bsky.feed.post',
232
+
createdAt: '2026-03-18T10:30:54.585Z',
233
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embed: {
234
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$type: 'app.bsky.embed.recordWithMedia',
235
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media: {
236
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$type: 'app.bsky.embed.images',
237
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images: [
238
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{
239
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alt: '',
240
+
aspectRatio: {
241
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height: 1000,
242
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width: 1000,
128
243
},
129
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facets: [
130
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{
131
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features: [
132
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{
133
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$type: 'app.bsky.richtext.facet#link',
134
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uri: 'https://storage.courtlistener.com/recap/gov.uscourts.nysd.639187/gov.uscourts.nysd.639187.49.0.pdf#page=2.00',
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},
136
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],
137
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index: {
138
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byteEnd: 305,
139
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byteStart: 264,
140
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},
244
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image: {
245
+
$type: 'blob',
246
+
ref: {
247
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$link: 'bafkreidxsvr467n65lox5btrv3ysnxkzmehgbzogqk46ho6sw67apuauyu',
141
248
},
142
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],
143
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langs: ['en'],
144
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text: 'NEW: ICE persuaded a magistrate judge that Columbia was violating 8 USC § 1324 by "harboring aliens" — i.e., students Yunseo Chung and Ranjani Srinivasan — by refusing to invite ICE onto its private campus to capture them, per the newly unsealed application. storage.courtlistener.com/recap/gov.us...',
145
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};
146
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},
147
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bench(record: any) {
148
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return do_not_optimize(is(atcute.AppBskyFeedPost.mainSchema, record));
149
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},
150
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};
151
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});
152
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153
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bench('atproto', function* () {
154
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yield {
155
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[0]() {
156
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return atproto.jsonToLex({
157
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$type: 'app.bsky.feed.post',
158
-
createdAt: '2025-05-13T21:16:55.043Z',
159
-
embed: {
160
-
$type: 'app.bsky.embed.images',
161
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images: [
162
-
{
163
-
alt: 'As explained below, Columbia University has been advised by immigration authorities that YUNSEO CHUNG is now present in the United States and that RANJANI SRINIVASAN was a removable alien and YUNSEO CHUNG is a removable\nalien. Despite this knowledge, Columbia University has refused, and continues to refuse, to permit immigration officers to locate and arrest RANJANI SRINIVASAN and YUNSEO CHUNG at their student housing and were and are thus concealing, harboring, or shielding from detection removable aliens, RANJANI SRINIVASAN and YUNSEO CHUNG, or are\nconspiring to do so.',
164
-
aspectRatio: {
165
-
height: 658,
166
-
width: 1382,
167
-
},
168
-
image: {
169
-
$type: 'blob',
170
-
ref: {
171
-
$link: 'bafkreievlpk5ra3mcdhcll3dkxnet5cncj4wmo6ofg75tee3wbynfm6dfq',
172
-
},
173
-
mimeType: 'image/jpeg',
174
-
size: 406921,
175
-
},
176
-
},
177
-
],
249
+
mimeType: 'image/jpeg',
250
+
size: 185316,
251
+
},
252
+
},
253
+
{
254
+
alt: '',
255
+
aspectRatio: {
256
+
height: 1920,
257
+
width: 1080,
178
258
},
179
-
facets: [
180
-
{
181
-
features: [
182
-
{
183
-
$type: 'app.bsky.richtext.facet#link',
184
-
uri: 'https://storage.courtlistener.com/recap/gov.uscourts.nysd.639187/gov.uscourts.nysd.639187.49.0.pdf#page=2.00',
185
-
},
186
-
],
187
-
index: {
188
-
byteEnd: 305,
189
-
byteStart: 264,
190
-
},
259
+
image: {
260
+
$type: 'blob',
261
+
ref: {
262
+
$link: 'bafkreic6romobsny3aavmkgqysqbt54z27htkwtp4rdjjyszneasstxjz4',
191
263
},
192
-
],
193
-
langs: ['en'],
194
-
text: 'NEW: ICE persuaded a magistrate judge that Columbia was violating 8 USC § 1324 by "harboring aliens" — i.e., students Yunseo Chung and Ranjani Srinivasan — by refusing to invite ICE onto its private campus to capture them, per the newly unsealed application. storage.courtlistener.com/recap/gov.us...',
195
-
});
264
+
mimeType: 'image/jpeg',
265
+
size: 947838,
266
+
},
267
+
},
268
+
],
269
+
},
270
+
record: {
271
+
$type: 'app.bsky.embed.record',
272
+
record: {
273
+
cid: 'bafyreigtx64bk7d63alydtfbpt5m3ebhh2cpybvncozxawuvvyso37aqfu',
274
+
uri: 'at://did:plc:vvn4cqb6l3mc4dg7n2lh6xb4/app.bsky.feed.post/3mhd2mqhahc2h',
196
275
},
197
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bench(record: any) {
198
-
return do_not_optimize(atproto.AppBskyFeedPost.validateRecord(record));
199
-
},
200
-
};
201
-
});
276
+
},
277
+
},
278
+
langs: ['es'],
279
+
text: 'Icon vs user!!',
202
280
});
203
-
204
-
summary(() => {
205
-
bench('atcute', function* () {
206
-
yield {
207
-
[0]() {
208
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const record: atcute.AppBskyFeedPost.Main = {
209
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$type: 'app.bsky.feed.post',
210
-
createdAt: new Date().toISOString(),
211
-
text: '👨👩👧👦'.repeat(90),
212
-
};
281
+
// #endregion
213
282
214
-
return record;
283
+
// #region external + self-labels (bot/feed posts) — 0.1%
284
+
pair({
285
+
$type: 'app.bsky.feed.post',
286
+
createdAt: '2026-03-18T09:58:36.000000Z',
287
+
embed: {
288
+
$type: 'app.bsky.embed.external',
289
+
external: {
290
+
description:
291
+
"Former reality TV star Jessie Holmes cruised to a repeat victory in the Iditarod, the roughly 1,000-mile sled dog race in Alaska",
292
+
thumb: {
293
+
$type: 'blob',
294
+
ref: {
295
+
$link: 'bafkreica5staxokii3db6xkxrzpnadh6rfptxexca3gtjqbvwoby5ghpsu',
296
+
},
297
+
mimeType: 'image/jpeg',
298
+
size: 235971,
215
299
},
216
-
bench(record: any) {
217
-
return do_not_optimize(is(atcute.AppBskyFeedPost.mainSchema, record));
218
-
},
219
-
};
220
-
});
300
+
title: 'Former reality TV star Jessie Holmes repeats as champion of the grueling Iditarod sled dog race',
301
+
uri: 'https://www.independent.co.uk/news/alaska-bering-sea-national-geographic-anchorage-willow-b2940836.html',
302
+
},
303
+
},
304
+
facets: [],
305
+
labels: {
306
+
$type: 'com.atproto.label.defs#selfLabels',
307
+
values: [],
308
+
},
309
+
langs: [],
310
+
tags: [],
311
+
text: "Former reality TV star Jessie Holmes repeats as champion of the grueling Iditarod sled dog race\n\nFormer reality TV star Jessie Holmes cruised to a repeat victory in the Iditarod, the roughly 1,000-mile sled dog race in Alaska\n",
312
+
});
313
+
// #endregion
221
314
222
-
bench('atproto', function* () {
223
-
yield {
224
-
[0]() {
225
-
const record: atcute.AppBskyFeedPost.Main = {
226
-
$type: 'app.bsky.feed.post',
227
-
createdAt: new Date().toISOString(),
228
-
text: '👨👩👧👦'.repeat(90),
229
-
};
230
-
231
-
return atproto.jsonToLex(record);
232
-
},
233
-
bench(record: any) {
234
-
return do_not_optimize(atproto.AppBskyFeedPost.validateRecord(record));
235
-
},
236
-
};
237
-
});
315
+
// #region grapheme stress test — family emoji at max grapheme limit
316
+
pair({
317
+
$type: 'app.bsky.feed.post',
318
+
createdAt: '2026-03-18T00:00:00.000Z',
319
+
text: '\u{1F468}\u{200D}\u{1F469}\u{200D}\u{1F467}\u{200D}\u{1F466}'.repeat(90),
238
320
});
321
+
// #endregion
239
322
240
323
await run();