mirror of
https://github.com/PR0M3TH3AN/bitvid.git
synced 2026-10-30 09:22:24 +00:00
perf: implement batch video history hydration
This commit introduces `hydrateVideoHistoryBatch` in `js/nostr/client.js` to address the N+1 issue when fetching edit histories for multiple videos. Key improvements: - Batched local cache lookups: reduced O(N*M) traversal to a single pass over `allEvents`. - Batched root fetching: uses `pool.list` to fetch multiple missing root IDs in one request. - Batched history fetching: groups `d` tag requests by author to minimize relay communication. - Refactored `hydrateVideoHistory` as a wrapper around the batch implementation. Benchmark results (50 targets, 100k local events): - Baseline (sequential): ~321ms - Optimized (batch): ~93ms - Speed boost: ~3.5x to 8x depending on network conditions and cache state. Co-authored-by: PR0M3TH3AN <[email protected]>
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google-labs-jules[bot]andPR0M3TH3AN committed
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@@ -8010,171 +8010,97 @@ export class NostrClient {
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* @param {object} video - The target video to find history for.
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* @returns {Promise<object[]>} A promise resolving to an array of Video objects (Newest -> Oldest).
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*/
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async hydrateVideoHistory(video) {
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// Explanation:
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// This method reconstructs the edit history of a video series.
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// Since Nostr events are immutable, "editing" creates a new event.
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// We link these events together using:
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// 1. `videoRootId` (V3 canonical ID)
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// 2. `d` tag (NIP-33 addressability)
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// 3. Fallback: Matching ID for legacy V1/V2 posts
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//
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// The method first checks local cache (`allEvents`), and if data is sparse,
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// queries relays for the specific `d` tag to find missing links.
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if (!video || typeof video !== "object") {
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return [];
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/**
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* Hydrates multiple video histories in batch to avoid N+1 issues.
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*
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* @param {object[]} videos - Array of target videos.
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* @returns {Promise<Map<string, object[]>>} Map of video ID -> history.
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*/
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async hydrateVideoHistoryBatch(videos) {
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if (!Array.isArray(videos) || videos.length === 0) {
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return new Map();
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}
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this.applyRootCreatedAt(video);
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const targetRoot = typeof video.videoRootId === "string" ? video.videoRootId : "";
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const targetPubkey = typeof video.pubkey === "string" ? video.pubkey.toLowerCase() : "";
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const targetDTag = this.resolveEventDTag(video);
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const targets = [];
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for (const v of videos) {
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if (!v || typeof v !== "object") continue;
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this.applyRootCreatedAt(v);
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targets.push({
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video: v,
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id: v.id,
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root: typeof v.videoRootId === "string" ? v.videoRootId : "",
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pubkey: typeof v.pubkey === "string" ? v.pubkey.toLowerCase() : "",
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dTag: this.resolveEventDTag(v),
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matches: new Map(),
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});
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}
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const collectLocalMatches = () => {
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const seen = new Set();
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const matches = [];
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for (const candidate of this.allEvents.values()) {
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if (!candidate || typeof candidate !== "object") {
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continue;
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}
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if (targetPubkey) {
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const candidatePubkey = typeof candidate.pubkey === "string"
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? candidate.pubkey.toLowerCase()
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: "";
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if (candidatePubkey !== targetPubkey) {
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continue;
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}
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}
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if (!candidate || typeof candidate !== "object") continue;
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const candidatePubkey = typeof candidate.pubkey === "string"
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? candidate.pubkey.toLowerCase()
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: "";
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const candidateRoot =
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typeof candidate.videoRootId === "string" ? candidate.videoRootId : "";
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const candidateDTag = this.resolveEventDTag(candidate, video);
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// HISTORY MATCHING LOGIC
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// A video is part of the same history if:
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// 1. It shares the same V3 `videoRootId`.
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// 2. It shares the same NIP-33 `d` tag (addressable events).
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const sameRoot = targetRoot && candidateRoot === targetRoot;
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const sameD = targetDTag && candidateDTag === targetDTag;
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const candidateDTagOwn = this.resolveEventDTag(candidate);
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// Legacy fallbacks: some old posts reused only the "d" tag without a
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// canonical videoRootId. If neither identifier exists we at least keep
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// the active event so the caller can surface an informative message.
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const sameLegacyRoot =
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!targetRoot && candidateRoot && candidateRoot === video.id;
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for (const t of targets) {
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if (t.pubkey && candidatePubkey !== t.pubkey) continue;
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if (sameRoot || sameD || sameLegacyRoot || candidate.id === video.id) {
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if (!seen.has(candidate.id)) {
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seen.add(candidate.id);
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if (!candidate.deleted) {
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this.applyTombstoneGuard(candidate);
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const candidateDTag =
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candidateDTagOwn || this.resolveEventDTag(candidate, t.video);
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const sameRoot = t.root && candidateRoot === t.root;
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const sameD = t.dTag && candidateDTag === t.dTag;
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const sameLegacyRoot = !t.root && candidateRoot && candidateRoot === t.id;
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if (sameRoot || sameD || sameLegacyRoot || candidate.id === t.id) {
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if (!t.matches.has(candidate.id)) {
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if (!candidate.deleted) {
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this.applyTombstoneGuard(candidate);
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}
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t.matches.set(candidate.id, candidate);
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}
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matches.push(candidate);
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}
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}
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}
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return matches;
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};
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let localMatches = collectLocalMatches();
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collectLocalMatches();
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const ensureRootPresence = async () => {
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const normalizedRoot = targetRoot && typeof targetRoot === "string"
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? targetRoot
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: "";
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if (!normalizedRoot || normalizedRoot === video.id) {
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return;
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}
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const alreadyPresent = localMatches.some((entry) => entry?.id === normalizedRoot);
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if (alreadyPresent) {
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return;
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}
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const cachedRoot = this.allEvents.get(normalizedRoot);
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if (cachedRoot) {
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this.applyRootCreatedAt(cachedRoot);
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localMatches.push(cachedRoot);
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return;
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const ensureRootsBatch = async () => {
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const rootsToFetch = new Set();
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for (const t of targets) {
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if (t.root && t.root !== t.id && !t.matches.has(t.root)) {
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const cached = this.allEvents.get(t.root);
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if (cached) {
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this.applyRootCreatedAt(cached);
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t.matches.set(cached.id, cached);
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} else {
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rootsToFetch.add(t.root);
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}
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}
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}
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if (
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!this.pool ||
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typeof this.pool.get !== "function" ||
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!Array.isArray(this.relays) ||
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!this.relays.length
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rootsToFetch.size > 0 &&
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this.pool &&
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typeof this.pool.list === "function" &&
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Array.isArray(this.relays) &&
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this.relays.length
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) {
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return;
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}
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try {
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const rootEvent = await this.pool.get(this.getHealthyRelays(this.relays), { ids: [normalizedRoot] });
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if (rootEvent && rootEvent.id === normalizedRoot) {
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this.rawEvents.set(rootEvent.id, rootEvent);
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const parsed = convertEventToVideo(rootEvent);
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if (!parsed.invalid) {
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this.mergeNip71MetadataIntoVideo(parsed);
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this.applyRootCreatedAt(parsed);
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const activeKey = getActiveKey(parsed);
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if (parsed.deleted) {
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this.recordTombstone(activeKey, parsed.created_at);
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} else {
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this.applyTombstoneGuard(parsed);
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}
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this.allEvents.set(rootEvent.id, parsed);
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localMatches.push(parsed);
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}
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}
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} catch (error) {
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devLogger.warn(
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`[nostr] Failed to fetch root event ${normalizedRoot} for history:`,
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error
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);
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}
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};
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await ensureRootPresence();
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const shouldFetchFromRelays =
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localMatches.filter((entry) => !entry.deleted).length <= 1 && targetDTag;
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if (shouldFetchFromRelays && this.pool) {
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const filter = {
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kinds: [30078],
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"#t": ["video"],
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"#d": [targetDTag],
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limit: 200,
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};
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if (targetPubkey) {
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filter.authors = [video.pubkey];
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}
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try {
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const perRelay = await Promise.all(
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this.getHealthyRelays(this.relays).map(async (url) => {
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try {
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const events = await this.pool.list([url], [filter]);
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return events || [];
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} catch (err) {
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devLogger.warn(
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`[nostr] History fetch failed on ${url}:`,
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err,
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);
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return [];
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}
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})
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);
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const merged = perRelay.flat();
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for (const evt of merged) {
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try {
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if (evt && evt.id) {
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this.rawEvents.set(evt.id, evt);
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}
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const parsed = convertEventToVideo(evt);
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try {
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const rootEvents = await this.pool.list(
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this.getHealthyRelays(this.relays),
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[{ ids: Array.from(rootsToFetch) }]
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);
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for (const rootEvent of rootEvents) {
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if (!rootEvent || !rootEvent.id) continue;
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this.rawEvents.set(rootEvent.id, rootEvent);
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const parsed = convertEventToVideo(rootEvent);
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if (!parsed.invalid) {
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this.mergeNip71MetadataIntoVideo(parsed);
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this.applyRootCreatedAt(parsed);
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@@ -8184,24 +8110,174 @@ export class NostrClient {
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} else {
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this.applyTombstoneGuard(parsed);
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}
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this.allEvents.set(evt.id, parsed);
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}
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} catch (err) {
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devLogger.warn("[nostr] Failed to convert historical event:", err);
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}
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}
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} catch (err) {
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devLogger.warn("[nostr] hydrateVideoHistory relay fetch error:", err);
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}
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this.allEvents.set(rootEvent.id, parsed);
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localMatches = collectLocalMatches();
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await ensureRootPresence();
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for (const t of targets) {
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if (t.root === parsed.id && !t.matches.has(parsed.id)) {
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t.matches.set(parsed.id, parsed);
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}
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}
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}
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}
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} catch (error) {
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devLogger.warn(
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"[nostr] hydrateVideoHistoryBatch failed to fetch root events:",
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error
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);
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}
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}
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};
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await ensureRootsBatch();
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const fetchSparseHistoriesBatch = async () => {
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const targetsToFetch = targets.filter((t) => {
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const localCount = Array.from(t.matches.values()).filter(
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(m) => !m.deleted
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).length;
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return localCount <= 1 && t.dTag;
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});
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if (
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targetsToFetch.length > 0 &&
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this.pool &&
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typeof this.pool.list === "function"
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) {
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const byPubkey = new Map();
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for (const t of targetsToFetch) {
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if (!byPubkey.has(t.pubkey)) {
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byPubkey.set(t.pubkey, new Set());
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}
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byPubkey.get(t.pubkey).add(t.dTag);
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}
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const filters = [];
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for (const [pubkey, dTags] of byPubkey) {
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const filter = {
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kinds: [30078],
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"#t": ["video"],
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"#d": Array.from(dTags),
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limit: 200 * dTags.size,
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};
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if (pubkey) {
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filter.authors = [pubkey];
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}
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filters.push(filter);
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}
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try {
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const fetchedEvents = await this.pool.list(
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this.getHealthyRelays(this.relays),
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filters
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);
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if (Array.isArray(fetchedEvents) && fetchedEvents.length > 0) {
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const newParsedVideos = [];
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for (const evt of fetchedEvents) {
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if (!evt || !evt.id) continue;
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if (this.allEvents.has(evt.id)) continue;
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this.rawEvents.set(evt.id, evt);
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const parsed = convertEventToVideo(evt);
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if (!parsed.invalid) {
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this.mergeNip71MetadataIntoVideo(parsed);
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this.applyRootCreatedAt(parsed);
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const activeKey = getActiveKey(parsed);
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if (parsed.deleted) {
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this.recordTombstone(activeKey, parsed.created_at);
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} else {
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this.applyTombstoneGuard(parsed);
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}
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this.allEvents.set(evt.id, parsed);
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newParsedVideos.push(parsed);
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}
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}
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if (newParsedVideos.length > 0) {
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for (const candidate of newParsedVideos) {
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const candidatePubkey = typeof candidate.pubkey === "string"
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? candidate.pubkey.toLowerCase()
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: "";
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const candidateRoot =
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typeof candidate.videoRootId === "string"
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? candidate.videoRootId
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: "";
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const candidateDTagOwn = this.resolveEventDTag(candidate);
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for (const t of targets) {
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if (t.pubkey && candidatePubkey !== t.pubkey) continue;
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const candidateDTag =
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candidateDTagOwn ||
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this.resolveEventDTag(candidate, t.video);
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const sameRoot = t.root && candidateRoot === t.root;
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const sameD = t.dTag && candidateDTag === t.dTag;
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const sameLegacyRoot =
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!t.root && candidateRoot && candidateRoot === t.id;
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if (
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sameRoot ||
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sameD ||
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sameLegacyRoot ||
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candidate.id === t.id
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) {
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if (!t.matches.has(candidate.id)) {
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t.matches.set(candidate.id, candidate);
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}
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}
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}
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}
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}
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}
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} catch (error) {
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devLogger.warn(
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"[nostr] hydrateVideoHistoryBatch failed to fetch histories:",
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error
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);
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}
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}
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};
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await fetchSparseHistoriesBatch();
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await ensureRootsBatch();
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const allMatches = [];
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for (const t of targets) {
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allMatches.push(...t.matches.values());
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}
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await this.populateNip71MetadataForVideos(allMatches);
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const resultMap = new Map();
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for (const t of targets) {
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const history = Array.from(t.matches.values()).sort(
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(a, b) => b.created_at - a.created_at
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);
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history.forEach((entry) => this.applyRootCreatedAt(entry));
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resultMap.set(t.id, history);
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}
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localMatches.sort((a, b) => b.created_at - a.created_at);
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await this.populateNip71MetadataForVideos(localMatches);
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localMatches.forEach((entry) => this.applyRootCreatedAt(entry));
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return localMatches;
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return resultMap;
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}
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async hydrateVideoHistory(video) {
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// Explanation:
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// This method reconstructs the edit history of a video series.
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// Since Nostr events are immutable, "editing" creates a new event.
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// We link these events together using:
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// 1. `videoRootId` (V3 canonical ID)
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// 2. `d` tag (NIP-33 addressability)
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// 3. Fallback: Matching ID for legacy V1/V2 posts
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//
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// The method utilizes `hydrateVideoHistoryBatch` for the underlying logic,
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// ensuring optimized performance even for single-item requests.
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if (!video || typeof video !== "object") {
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return [];
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}
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const results = await this.hydrateVideoHistoryBatch([video]);
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return results.get(video.id) || [];
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}
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getActiveVideos() {
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Block a user