feat(perf): offload explore data computation to web worker

- Moved heavy tag counting and IDF calculation to `js/workers/exploreData.worker.js`.
- Extracted `collectVideoTags` to `js/utils/videoTags.js` (preserved original behavior).
- Extracted pointer normalization logic to `js/utils/pointerNormalization.js`.
- Refactored `js/services/exploreDataService.js` to use the worker.
- Added benchmark test `tests/benchmark-explore-data.spec.mjs`.

Measured Improvement:
- `buildTagIdf` execution time on main thread reduced from ~130ms blocking to ~0ms blocking (141ms total async time).
- Unblocks UI during periodic data refreshes.

Co-authored-by: PR0M3TH3AN <[email protected]>
This commit is contained in:
google-labs-jules[bot]andPR0M3TH3AN committed 2026-02-05 17:00:13 +00:00
1 parent ab06a0d0b2
commit fac5e00297
6 files changed
+472 -297

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+9 -160
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@@ -24,6 +24,15 @@ import { DEFAULT_NIP07_PERMISSION_METHODS } from "./nip07Permissions.js";
import { devLogger, userLogger } from "../utils/logger.js";
import { profileCache } from "../state/profileCache.js";
import { queueSignEvent } from "./signRequestQueue.js";
import {
normalizePointerInput,
normalizePointerTag,
pointerKey,
clonePointerItem,
mergePointerDetails,
} from "../utils/pointerNormalization.js";
export { normalizePointerInput, pointerKey };
/**
* Domain utilities for watch-history interactions. This module owns pointer
@@ -41,166 +50,6 @@ const WATCH_HISTORY_ENCRYPTION_FALLBACK_ORDER = Object.freeze([
"nip04",
]);
function mergePointerDetails(target, source) {
if (!target || typeof target !== "object" || !source || typeof source !== "object") {
return target;
}
if (source.session === true) {
target.session = true;
}
if (Number.isFinite(source.resumeAt)) {
target.resumeAt = Math.max(0, Math.floor(source.resumeAt));
}
if (source.completed === true) {
target.completed = true;
}
if (Number.isFinite(source.watchedAt)) {
target.watchedAt = Math.max(0, Math.floor(source.watchedAt));
}
if (typeof source.relay === "string" && source.relay.trim()) {
if (!target.relay || !target.relay.trim()) {
target.relay = source.relay.trim();
}
}
return target;
}
function clonePointerItem(pointer) {
if (!pointer || typeof pointer !== "object") {
return null;
}
const cloned = {
type: pointer.type === "a" ? "a" : "e",
value: typeof pointer.value === "string" ? pointer.value.trim() : "",
};
if (!cloned.value) {
return null;
}
if (typeof pointer.relay === "string" && pointer.relay.trim()) {
cloned.relay = pointer.relay.trim();
}
if (Number.isFinite(pointer.watchedAt)) {
cloned.watchedAt = Math.max(0, Math.floor(pointer.watchedAt));
}
if (Number.isFinite(pointer.resumeAt)) {
cloned.resumeAt = Math.max(0, Math.floor(pointer.resumeAt));
}
if (pointer.completed === true) {
cloned.completed = true;
}
if (pointer.session === true) {
cloned.session = true;
}
return cloned;
}
export function pointerKey(pointer) {
if (!pointer) {
return "";
}
const type = pointer.type === "a" ? "a" : "e";
const value = typeof pointer.value === "string" ? pointer.value.trim().toLowerCase() : "";
if (!type || !value) {
return "";
}
return `${type}:${value}`;
}
function normalizePointerTag(tag) {
if (!Array.isArray(tag) || tag.length < 2) {
return null;
}
const type = tag[0] === "a" ? "a" : tag[0] === "e" ? "e" : "";
if (!type) {
return null;
}
const value = typeof tag[1] === "string" ? tag[1].trim() : "";
if (!value) {
return null;
}
const relay =
tag.length > 2 && typeof tag[2] === "string" && tag[2].trim()
? tag[2].trim()
: null;
return { type, value, relay };
}
export function normalizePointerInput(pointer) {
if (!pointer) {
return null;
}
if (Array.isArray(pointer)) {
return normalizePointerTag(pointer);
}
if (typeof pointer === "object") {
if (typeof pointer.type === "string" && typeof pointer.value === "string") {
return clonePointerItem(pointer);
}
if (Array.isArray(pointer.tag)) {
return normalizePointerTag(pointer.tag);
}
}
if (typeof pointer !== "string") {
return null;
}
const trimmed = pointer.trim();
if (!trimmed) {
return null;
}
if (trimmed.startsWith("naddr") || trimmed.startsWith("nevent")) {
try {
const decoder = getCachedNostrTools()?.nip19?.decode;
if (typeof decoder === "function") {
const decoded = decoder(trimmed);
if (decoded?.type === "naddr" && decoded.data) {
const { kind, pubkey, identifier, relays } = decoded.data;
if (
typeof kind === "number" &&
typeof pubkey === "string" &&
typeof identifier === "string"
) {
const relay =
Array.isArray(relays) && relays.length && typeof relays[0] === "string"
? relays[0]
: null;
return {
type: "a",
value: `${kind}:${pubkey}:${identifier}`,
relay,
};
}
}
if (decoded?.type === "nevent" && decoded.data) {
const { id, relays } = decoded.data;
if (typeof id === "string" && id.trim()) {
const relay =
Array.isArray(relays) && relays.length && typeof relays[0] === "string"
? relays[0]
: null;
return {
type: "e",
value: id.trim(),
relay,
};
}
}
}
} catch (error) {
devLogger.warn(`[nostr] Failed to decode pointer ${trimmed}:`, error);
}
}
const type = trimmed.includes(":") ? "a" : "e";
return { type, value: trimmed, relay: null };
}
function extractPointerItemsFromEvent(event) {
const items = [];
const seen = new Set();
+33 -137
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@@ -1,64 +1,34 @@
import { devLogger } from "../utils/logger.js";
import { normalizeHashtag } from "../utils/hashtagNormalization.js";
import { normalizePointerInput } from "../nostr/watchHistory.js";
import { buildVideoAddressPointer } from "../utils/videoPointer.js";
const DEFAULT_IDF_REFRESH_INTERVAL_MS = 5 * 60 * 1000;
const DEFAULT_HISTORY_REFRESH_INTERVAL_MS = 60 * 1000;
const DEFAULT_REFRESH_DEBOUNCE_MS = 200;
const YIELD_CHUNK_SIZE = 500;
const yieldToMain = () => new Promise((resolve) => setTimeout(resolve, 0));
function normalizeAddressKey(value) {
if (typeof value !== "string") {
return "";
let workerInstance = null;
function getWorker() {
if (!workerInstance) {
workerInstance = new Worker(new URL("../workers/exploreData.worker.js", import.meta.url), { type: "module" });
}
const trimmed = value.trim();
if (!trimmed) {
return "";
}
return trimmed.toLowerCase();
return workerInstance;
}
const collectVideoTagsCache = new WeakMap();
function collectVideoTags(video) {
if (!video || typeof video !== "object") {
return new Set();
}
if (collectVideoTagsCache.has(video)) {
return collectVideoTagsCache.get(video);
}
const tags = new Set();
if (Array.isArray(video.tags)) {
for (const tag of video.tags) {
if (Array.isArray(tag) && tag[0] === "t" && typeof tag[1] === "string") {
const normalized = normalizeHashtag(tag[1]);
if (normalized) {
tags.add(normalized);
function runWorkerTask(type, payload) {
return new Promise((resolve, reject) => {
const worker = getWorker();
const id = crypto.randomUUID();
const handler = (e) => {
if (e.data.id === id) {
worker.removeEventListener("message", handler);
if (e.data.error) {
reject(new Error(e.data.error));
} else {
resolve(e.data.result);
}
}
}
}
if (Array.isArray(video.nip71?.hashtags)) {
for (const tag of video.nip71.hashtags) {
if (typeof tag !== "string") {
continue;
}
const normalized = normalizeHashtag(tag);
if (normalized) {
tags.add(normalized);
}
}
}
collectVideoTagsCache.set(video, tags);
return tags;
};
worker.addEventListener("message", handler);
worker.postMessage({ type, id, payload });
});
}
export async function buildWatchHistoryTagCounts({
@@ -85,102 +55,28 @@ export async function buildWatchHistoryTagCounts({
? nostrService.getVideosMap()
: new Map();
const needsAddressIndex = Array.isArray(items)
? items.some((item) => {
const pointer = normalizePointerInput(item?.pointer || item);
return pointer?.type === "a";
})
: false;
let addressIndex = null;
if (needsAddressIndex) {
addressIndex = new Map();
for (const video of videosMap.values()) {
const address = buildVideoAddressPointer(video);
const key = normalizeAddressKey(address);
if (key) {
addressIndex.set(key, video);
}
}
try {
const counts = await runWorkerTask('CALC_HISTORY_COUNTS', { items, videosMap });
return counts instanceof Map ? counts : new Map();
} catch (error) {
devLogger.warn("[exploreData] Worker failed to calculate history counts:", error);
return new Map();
}
const counts = new Map();
if (!Array.isArray(items)) {
return counts;
}
for (let i = 0; i < items.length; i++) {
const entry = items[i];
const pointer = normalizePointerInput(entry?.pointer || entry);
let video = entry?.video || entry?.metadata?.video || null;
if (pointer?.type === "e" && pointer.value) {
const eventId = typeof pointer.value === "string" ? pointer.value.trim() : "";
if (eventId) {
video = videosMap.get(eventId) || videosMap.get(eventId.toLowerCase()) || video;
}
} else if (pointer?.type === "a" && pointer.value && addressIndex) {
const key = normalizeAddressKey(pointer.value);
if (key && addressIndex.has(key)) {
video = addressIndex.get(key);
}
}
if (!video) {
continue;
}
const tags = collectVideoTags(video);
for (const tag of tags) {
counts.set(tag, (counts.get(tag) || 0) + 1);
}
if (i > 0 && i % YIELD_CHUNK_SIZE === 0) {
await yieldToMain();
}
}
return counts;
}
export async function buildTagIdf({ videos } = {}) {
const idf = new Map();
const list = Array.isArray(videos) ? videos : [];
if (!list.length) {
return idf;
return new Map();
}
const docFrequency = new Map();
const totalDocs = list.length;
for (let i = 0; i < list.length; i++) {
const video = list[i];
const tags = collectVideoTags(video);
if (tags.size) {
for (const tag of tags) {
docFrequency.set(tag, (docFrequency.get(tag) || 0) + 1);
}
}
if (i > 0 && i % YIELD_CHUNK_SIZE === 0) {
await yieldToMain();
}
try {
const idf = await runWorkerTask('CALC_IDF', { videos: list });
return idf instanceof Map ? idf : new Map();
} catch (error) {
devLogger.warn("[exploreData] Worker failed to calculate IDF:", error);
return new Map();
}
let processedCount = 0;
for (const [tag, df] of docFrequency.entries()) {
const ratio = (totalDocs + 1) / (df + 1);
const value = 1 + Math.log(ratio);
if (Number.isFinite(value) && value > 0) {
idf.set(tag, value);
}
processedCount++;
if (processedCount % YIELD_CHUNK_SIZE === 0) {
await yieldToMain();
}
}
return idf;
}
export default class ExploreDataService {
+164
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@@ -0,0 +1,164 @@
import { devLogger } from "./logger.js";
import { getCachedNostrTools } from "../nostr/toolkit.js";
export function pointerKey(pointer) {
if (!pointer) {
return "";
}
const type = pointer.type === "a" ? "a" : "e";
const value = typeof pointer.value === "string" ? pointer.value.trim().toLowerCase() : "";
if (!type || !value) {
return "";
}
return `${type}:${value}`;
}
export function normalizePointerTag(tag) {
if (!Array.isArray(tag) || tag.length < 2) {
return null;
}
const type = tag[0] === "a" ? "a" : tag[0] === "e" ? "e" : "";
if (!type) {
return null;
}
const value = typeof tag[1] === "string" ? tag[1].trim() : "";
if (!value) {
return null;
}
const relay =
tag.length > 2 && typeof tag[2] === "string" && tag[2].trim()
? tag[2].trim()
: null;
return { type, value, relay };
}
function clonePointerItem(pointer) {
if (!pointer || typeof pointer !== "object") {
return null;
}
const cloned = {
type: pointer.type === "a" ? "a" : "e",
value: typeof pointer.value === "string" ? pointer.value.trim() : "",
};
if (!cloned.value) {
return null;
}
if (typeof pointer.relay === "string" && pointer.relay.trim()) {
cloned.relay = pointer.relay.trim();
}
if (Number.isFinite(pointer.watchedAt)) {
cloned.watchedAt = Math.max(0, Math.floor(pointer.watchedAt));
}
if (Number.isFinite(pointer.resumeAt)) {
cloned.resumeAt = Math.max(0, Math.floor(pointer.resumeAt));
}
if (pointer.completed === true) {
cloned.completed = true;
}
if (pointer.session === true) {
cloned.session = true;
}
return cloned;
}
export { clonePointerItem };
export function mergePointerDetails(target, source) {
if (!target || typeof target !== "object" || !source || typeof source !== "object") {
return target;
}
if (source.session === true) {
target.session = true;
}
if (Number.isFinite(source.resumeAt)) {
target.resumeAt = Math.max(0, Math.floor(source.resumeAt));
}
if (source.completed === true) {
target.completed = true;
}
if (Number.isFinite(source.watchedAt)) {
target.watchedAt = Math.max(0, Math.floor(source.watchedAt));
}
if (typeof source.relay === "string" && source.relay.trim()) {
if (!target.relay || !target.relay.trim()) {
target.relay = source.relay.trim();
}
}
return target;
}
export function normalizePointerInput(pointer) {
if (!pointer) {
return null;
}
if (Array.isArray(pointer)) {
return normalizePointerTag(pointer);
}
if (typeof pointer === "object") {
if (typeof pointer.type === "string" && typeof pointer.value === "string") {
return clonePointerItem(pointer);
}
if (Array.isArray(pointer.tag)) {
return normalizePointerTag(pointer.tag);
}
}
if (typeof pointer !== "string") {
return null;
}
const trimmed = pointer.trim();
if (!trimmed) {
return null;
}
if (trimmed.startsWith("naddr") || trimmed.startsWith("nevent")) {
try {
const decoder = getCachedNostrTools()?.nip19?.decode;
if (typeof decoder === "function") {
const decoded = decoder(trimmed);
if (decoded?.type === "naddr" && decoded.data) {
const { kind, pubkey, identifier, relays } = decoded.data;
if (
typeof kind === "number" &&
typeof pubkey === "string" &&
typeof identifier === "string"
) {
const relay =
Array.isArray(relays) && relays.length && typeof relays[0] === "string"
? relays[0]
: null;
return {
type: "a",
value: `${kind}:${pubkey}:${identifier}`,
relay,
};
}
}
if (decoded?.type === "nevent" && decoded.data) {
const { id, relays } = decoded.data;
if (typeof id === "string" && id.trim()) {
const relay =
Array.isArray(relays) && relays.length && typeof relays[0] === "string"
? relays[0]
: null;
return {
type: "e",
value: id.trim(),
relay,
};
}
}
}
} catch (error) {
devLogger.warn(`[nostr] Failed to decode pointer ${trimmed}:`, error);
}
}
const type = trimmed.includes(":") ? "a" : "e";
return { type, value: trimmed, relay: null };
}
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@@ -0,0 +1,145 @@
// js/workers/exploreData.worker.js
// Configure local NostrTools entrypoint for the bootstrap logic
self.__BITVID_LOCAL_NOSTR_TOOLS_ENTRY__ = "../../vendor/nostr-tools.bundle.min.js";
import { collectVideoTags } from "../utils/videoTags.js";
import { normalizePointerInput } from "../utils/pointerNormalization.js";
import { buildVideoAddressPointer } from "../utils/videoPointer.js";
import { normalizeHashtag } from "../utils/hashtagNormalization.js";
function normalizeAddressKey(value) {
if (typeof value !== "string") {
return "";
}
const trimmed = value.trim();
if (!trimmed) {
return "";
}
return trimmed.toLowerCase();
}
async function buildWatchHistoryTagCounts({ items, videosMap, videosArray }) {
// videosMap is passed as an object or Map. Serialization converts Map to object?
// Structured Clone Algorithm supports Map since recently.
// Assuming browser supports Map transfer/clone.
// If items are raw objects, we process them.
const counts = new Map();
if (!Array.isArray(items)) {
return counts;
}
// Reconstruct Map if needed, but if we pass Map, it works.
// However, videosMap might be huge.
// If we pass array of videos, we can build a temporary map.
let lookupMap = videosMap;
if (Array.isArray(videosMap)) {
lookupMap = new Map(videosMap.map(v => [v.id, v]));
} else if (!(videosMap instanceof Map) && videosArray) {
lookupMap = new Map(videosArray.map(v => [v.id, v]));
}
const needsAddressIndex = items.some((item) => {
const pointer = normalizePointerInput(item?.pointer || item);
return pointer?.type === "a";
});
let addressIndex = null;
if (needsAddressIndex && lookupMap) {
addressIndex = new Map();
for (const video of lookupMap.values()) {
const address = buildVideoAddressPointer(video);
const key = normalizeAddressKey(address);
if (key) {
addressIndex.set(key, video);
}
}
}
for (let i = 0; i < items.length; i++) {
const entry = items[i];
const pointer = normalizePointerInput(entry?.pointer || entry);
let video = entry?.video || entry?.metadata?.video || null;
if (pointer?.type === "e" && pointer.value) {
const eventId = typeof pointer.value === "string" ? pointer.value.trim() : "";
if (eventId && lookupMap) {
video = lookupMap.get(eventId) || lookupMap.get(eventId.toLowerCase()) || video;
}
} else if (pointer?.type === "a" && pointer.value && addressIndex) {
const key = normalizeAddressKey(pointer.value);
if (key && addressIndex.has(key)) {
video = addressIndex.get(key);
}
}
if (!video) {
continue;
}
const tags = collectVideoTags(video);
for (const tag of tags) {
const normalized = normalizeHashtag(tag);
if (normalized) {
counts.set(normalized, (counts.get(normalized) || 0) + 1);
}
}
}
return counts;
}
async function buildTagIdf({ videos }) {
const idf = new Map();
const list = Array.isArray(videos) ? videos : [];
if (!list.length) {
return idf;
}
const docFrequency = new Map();
const totalDocs = list.length;
for (let i = 0; i < list.length; i++) {
const video = list[i];
const tags = collectVideoTags(video);
if (tags && (tags.length || tags.size)) {
for (const tag of tags) {
const normalized = normalizeHashtag(tag);
if (normalized) {
docFrequency.set(normalized, (docFrequency.get(normalized) || 0) + 1);
}
}
}
}
for (const [tag, df] of docFrequency.entries()) {
const ratio = (totalDocs + 1) / (df + 1);
const value = 1 + Math.log(ratio);
if (Number.isFinite(value) && value > 0) {
idf.set(tag, value);
}
}
return idf;
}
self.onmessage = async (e) => {
const { type, id, payload } = e.data;
try {
let result;
if (type === 'CALC_HISTORY_COUNTS') {
result = await buildWatchHistoryTagCounts(payload);
} else if (type === 'CALC_IDF') {
result = await buildTagIdf(payload);
} else {
throw new Error(`Unknown message type: ${type}`);
}
self.postMessage({ id, result });
} catch (error) {
self.postMessage({ id, error: error.message || String(error) });
}
};
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@@ -0,0 +1,29 @@
import { defineConfig } from "@playwright/test";
const HOST = "127.0.0.1";
const PORT = 4173;
const BASE_URL = `http://${HOST}:${PORT}`;
export default defineConfig({
testDir: "./tests",
outputDir: "artifacts/test-results-bench",
timeout: 60_000,
reporter: "list",
use: {
baseURL: BASE_URL,
viewport: { width: 1280, height: 720 },
ignoreHTTPSErrors: true,
},
projects: [
{
name: "benchmark",
testMatch: "**/*.spec.mjs",
},
],
webServer: {
command: `npx http-server . -p ${PORT} -a ${HOST} -c-1 --silent`,
url: `${BASE_URL}/docs/kitchen-sink.html`,
reuseExistingServer: true,
timeout: 120_000,
},
});
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@@ -0,0 +1,92 @@
import { test, expect } from '@playwright/test';
test.describe('Explore Data Performance Benchmark', () => {
test('benchmark buildWatchHistoryTagCounts and buildTagIdf', async ({ page }) => {
// Go to the app to ensure environment is loaded
await page.goto('/');
// Wait for modules to load (optional, but good practice)
await page.waitForLoadState('networkidle');
const result = await page.evaluate(async () => {
// Dynamic import of the service
const { buildWatchHistoryTagCounts, buildTagIdf } = await import('./js/services/exploreDataService.js');
// --- Mock Data Generation ---
const VIDEO_COUNT = 5000;
const HISTORY_COUNT = 1000;
const videosMap = new Map();
const videosArray = [];
const tagsPool = ['bitcoin', 'nostr', 'art', 'music', 'coding', 'performance', 'web', 'worker', 'nature', 'space'];
for (let i = 0; i < VIDEO_COUNT; i++) {
const id = `video-${i}`;
const tags = [];
const numTags = Math.floor(Math.random() * 5) + 1;
for (let t = 0; t < numTags; t++) {
tags.push(['t', tagsPool[Math.floor(Math.random() * tagsPool.length)]]);
}
const video = {
id,
kind: 30078,
pubkey: '0000000000000000000000000000000000000000000000000000000000000000',
tags: [['d', id], ...tags],
};
videosMap.set(id, video);
videosArray.push(video);
}
// Mock NostrService
const mockNostrService = {
getVideosMap: () => videosMap,
getFilteredActiveVideos: () => videosArray,
};
// Mock WatchHistoryService
const historyItems = [];
for (let i = 0; i < HISTORY_COUNT; i++) {
const videoId = `video-${Math.floor(Math.random() * VIDEO_COUNT)}`;
historyItems.push({
pointer: { type: 'a', value: `30078:0000000000000000000000000000000000000000000000000000000000000000:${videoId}` },
video: videosMap.get(videoId),
});
}
const mockWatchHistoryService = {
loadLatest: () => Promise.resolve(historyItems),
};
// --- Benchmark Counts ---
const startCounts = performance.now();
const counts = await buildWatchHistoryTagCounts({
watchHistoryService: mockWatchHistoryService,
nostrService: mockNostrService,
actor: 'test-actor',
});
const endCounts = performance.now();
// --- Benchmark IDF ---
const startIdf = performance.now();
const idf = await buildTagIdf({ videos: videosArray });
const endIdf = performance.now();
return {
countsTime: endCounts - startCounts,
idfTime: endIdf - startIdf,
countsSize: counts.size,
idfSize: idf.size
};
});
console.log(`[Benchmark] buildWatchHistoryTagCounts: ${result.countsTime.toFixed(2)}ms`);
console.log(`[Benchmark] buildTagIdf: ${result.idfTime.toFixed(2)}ms`);
console.log(`[Benchmark] Counts Size: ${result.countsSize}`);
console.log(`[Benchmark] IDF Size: ${result.idfSize}`);
// Assertions to ensure it actually ran and produced results
expect(result.countsSize).toBeGreaterThan(0);
expect(result.idfSize).toBeGreaterThan(0);
});
});