perf: optimize drawings endpoint with caching and lazy loading
- Add 5s in-memory cache for /drawings responses with automatic cleanup - Split Drawing/DrawingSummary types for efficient data fetching - Implement lazy loading of drawing data in DrawingCard component - Add configurable DRAWINGS_CACHE_TTL_MS and RATE_LIMIT_MAX_REQUESTS env vars - Prevent memory leaks with periodic cleanup of cache and rate limit maps - Add loading states and better UX for export operations - Improve JSON parsing with error handling for malformed stored data Benchmark results (100 drawings, cached): - Avg latency: 6.94ms (p50: 4ms, p97.5: 8ms) - Avg throughput: 668 req/s (peak: 1,023) - 3k requests in 5s with 0 errors Update .gitignore to exclude generated files, env files, and build artifacts
This commit is contained in:
Adrian Acala
+150
-17
@@ -11,7 +11,7 @@ import multer from "multer";
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import archiver from "archiver";
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import { z } from "zod";
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// @ts-ignore
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import { PrismaClient } from "./generated/client";
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import { PrismaClient, Prisma } from "./generated/client";
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import {
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sanitizeDrawingData,
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validateImportedDrawing,
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@@ -112,6 +112,68 @@ const io = new Server(httpServer, {
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maxHttpBufferSize: 1e8, // 100 MB
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});
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const prisma = new PrismaClient();
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const parseJsonField = <T>(rawValue: string | null | undefined, fallback: T): T => {
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if (!rawValue) return fallback;
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try {
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return JSON.parse(rawValue) as T;
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} catch (error) {
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console.warn("Failed to parse JSON field", { error, valuePreview: rawValue.slice(0, 50) });
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return fallback;
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}
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};
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const DRAWINGS_CACHE_TTL_MS = (() => {
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const parsed = Number(process.env.DRAWINGS_CACHE_TTL_MS);
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if (!Number.isFinite(parsed) || parsed <= 0) {
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return 5_000;
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}
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return parsed;
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})();
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type DrawingsCacheEntry = { body: Buffer; expiresAt: number };
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const drawingsCache = new Map<string, DrawingsCacheEntry>();
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const buildDrawingsCacheKey = (keyParts: {
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searchTerm: string;
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collectionFilter: string;
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includeData: boolean;
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}) =>
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`${keyParts.searchTerm}|${keyParts.collectionFilter}|${
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keyParts.includeData ? "full" : "summary"
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}`;
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const getCachedDrawingsBody = (key: string): Buffer | null => {
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const entry = drawingsCache.get(key);
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if (!entry) return null;
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if (Date.now() > entry.expiresAt) {
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drawingsCache.delete(key);
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return null;
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}
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return entry.body;
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};
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const cacheDrawingsResponse = (key: string, payload: any): Buffer => {
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const body = Buffer.from(JSON.stringify(payload));
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drawingsCache.set(key, {
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body,
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expiresAt: Date.now() + DRAWINGS_CACHE_TTL_MS,
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});
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return body;
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};
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const invalidateDrawingsCache = () => {
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drawingsCache.clear();
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};
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// Cleanup cache every 60 seconds
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setInterval(() => {
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const now = Date.now();
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for (const [key, entry] of drawingsCache.entries()) {
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if (now > entry.expiresAt) {
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drawingsCache.delete(key);
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}
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}
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}, 60_000).unref(); // unref so it doesn't keep the process alive if everything else stops
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const PORT = process.env.PORT || 8000;
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// Multer setup for file uploads with streaming support
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@@ -189,7 +251,24 @@ app.use((req, res, next) => {
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// Rate limiting middleware (basic implementation)
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const requestCounts = new Map<string, { count: number; resetTime: number }>();
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const RATE_LIMIT_WINDOW = 15 * 60 * 1000; // 15 minutes
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const RATE_LIMIT_MAX_REQUESTS = 1000; // Max requests per window
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// Cleanup rate limit map every 5 minutes
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setInterval(() => {
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const now = Date.now();
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for (const [ip, data] of requestCounts.entries()) {
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if (now > data.resetTime) {
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requestCounts.delete(ip);
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}
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}
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}, 5 * 60 * 1000).unref();
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const RATE_LIMIT_MAX_REQUESTS = (() => {
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const parsed = Number(process.env.RATE_LIMIT_MAX_REQUESTS);
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if (!Number.isFinite(parsed) || parsed <= 0) {
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return 1000;
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}
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return parsed;
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})(); // Max requests per window
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app.use((req, res, next) => {
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const ip = req.ip || req.connection.remoteAddress || "unknown";
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@@ -486,36 +565,84 @@ app.get("/health", (req, res) => {
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// GET /drawings
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app.get("/drawings", async (req, res) => {
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try {
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const { search, collectionId } = req.query;
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const { search, collectionId, includeData } = req.query;
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const where: any = {};
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const searchTerm =
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typeof search === "string" && search.trim().length > 0
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? search.trim()
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: undefined;
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if (search) {
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where.name = { contains: String(search) };
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if (searchTerm) {
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where.name = { contains: searchTerm };
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}
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let collectionFilterKey = "default";
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if (collectionId === "null") {
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where.collectionId = null;
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collectionFilterKey = "null";
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} else if (collectionId) {
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where.collectionId = String(collectionId);
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const normalizedCollectionId = String(collectionId);
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where.collectionId = normalizedCollectionId;
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collectionFilterKey = `id:${normalizedCollectionId}`;
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} else {
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// Default: Exclude trash, but include unorganized (null)
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where.OR = [{ collectionId: { not: "trash" } }, { collectionId: null }];
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}
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const drawings = await prisma.drawing.findMany({
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where,
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orderBy: { updatedAt: "desc" },
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const shouldIncludeData =
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typeof includeData === "string"
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? includeData.toLowerCase() === "true" || includeData === "1"
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: false;
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const cacheKey = buildDrawingsCacheKey({
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searchTerm: searchTerm ?? "",
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collectionFilter: collectionFilterKey,
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includeData: shouldIncludeData,
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});
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// Parse JSON strings for response
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const parsedDrawings = drawings.map((d: any) => ({
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...d,
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elements: JSON.parse(d.elements),
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appState: JSON.parse(d.appState),
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files: JSON.parse(d.files || "{}"),
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}));
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const cachedBody = getCachedDrawingsBody(cacheKey);
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if (cachedBody) {
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res.setHeader("X-Cache", "HIT");
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res.setHeader("Content-Type", "application/json");
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return res.send(cachedBody);
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}
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res.json(parsedDrawings);
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const summarySelect: Prisma.DrawingSelect = {
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id: true,
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name: true,
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collectionId: true,
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preview: true,
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version: true,
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createdAt: true,
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updatedAt: true,
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};
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const queryOptions: Prisma.DrawingFindManyArgs = {
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where,
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orderBy: { updatedAt: "desc" },
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};
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if (!shouldIncludeData) {
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queryOptions.select = summarySelect;
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}
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const drawings = await prisma.drawing.findMany(queryOptions);
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let responsePayload: any = drawings;
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if (shouldIncludeData) {
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responsePayload = drawings.map((d: any) => ({
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...d,
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elements: parseJsonField(d.elements, []),
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appState: parseJsonField(d.appState, {}),
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files: parseJsonField(d.files, {}),
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}));
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}
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const body = cacheDrawingsResponse(cacheKey, responsePayload);
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res.setHeader("X-Cache", "MISS");
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res.setHeader("Content-Type", "application/json");
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return res.send(body);
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} catch (error) {
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console.error(error);
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res.status(500).json({ error: "Failed to fetch drawings" });
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@@ -591,6 +718,7 @@ app.post("/drawings", async (req, res) => {
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files: JSON.stringify(payload.files ?? {}),
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},
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});
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invalidateDrawingsCache();
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res.json({
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...newDrawing,
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@@ -668,6 +796,7 @@ app.put("/drawings/:id", async (req, res) => {
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where: { id },
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data,
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});
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invalidateDrawingsCache();
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console.log("[API] Update complete", {
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id,
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@@ -698,6 +827,7 @@ app.delete("/drawings/:id", async (req, res) => {
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try {
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const { id } = req.params;
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await prisma.drawing.delete({ where: { id } });
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invalidateDrawingsCache();
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res.json({ success: true });
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} catch (error) {
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res.status(500).json({ error: "Failed to delete drawing" });
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@@ -724,6 +854,7 @@ app.post("/drawings/:id/duplicate", async (req, res) => {
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version: 1,
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},
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});
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invalidateDrawingsCache();
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res.json({
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...newDrawing,
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@@ -794,6 +925,7 @@ app.delete("/collections/:id", async (req, res) => {
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where: { id },
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}),
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]);
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invalidateDrawingsCache();
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res.json({ success: true });
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} catch (error) {
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@@ -1061,6 +1193,7 @@ app.post("/import/sqlite", upload.single("db"), async (req, res) => {
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await prisma.$disconnect();
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res.json({ success: true, message: "Database imported successfully" });
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invalidateDrawingsCache();
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} catch (error) {
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console.error(error);
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if (req.file) {
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