Miro performance tuning

Miro Performance Tuning

Overview

Optimize Miro REST API v2 throughput and latency. Key levers: minimize API calls with cursor pagination, cache board/item data, batch writes with controlled concurrency, and use connection pooling.

Latency Benchmarks

Typical latencies for api.miro.com (US region):

Operation	Endpoint	P50	P95	Credits
Get board	GET /v2/boards/{id}	80ms	200ms	Level 1
List items (50)	GET /v2/boards/{id}/items?limit=50	120ms	350ms	Level 1
Create sticky note	POST /v2/boards/{id}/sticky_notes	150ms	400ms	Level 2
Create connector	POST /v2/boards/{id}/connectors	160ms	420ms	Level 2
Update item	PATCH /v2/boards/{id}/items/{id}	130ms	350ms	Level 2
Delete item	DELETE /v2/boards/{id}/items/{id}	100ms	280ms	Level 2

Cursor Pagination (Eliminate Over-Fetching)

Miro v2 uses cursor-based pagination. Fetch only what you need.

// Efficient paginated iterator
async function* paginateItems(
  boardId: string,
  options: { type?: string; limit?: number } = {}
): AsyncGenerator<MiroBoardItem> {
  const limit = options.limit ?? 50;  // Max 50 per page
  let cursor: string | undefined;

  do {
    const params = new URLSearchParams({ limit: String(limit) });
    if (options.type) params.set('type', options.type);
    if (cursor) params.set('cursor', cursor);

    const response = await fetch(
      `https://api.miro.com/v2/boards/${boardId}/items?${params}`,
      { headers: { 'Authorization': `Bearer ${token}` } }
    );

    const page = await response.json();
    for (const item of page.data) {
      yield item;
    }

    cursor = page.cursor;  // undefined when no more pages
  } while (cursor);
}

// Usage: process items without loading entire board into memory
for await (const item of paginateItems(boardId, { type: 'sticky_note' })) {
  await processItem(item);
}

Caching Strategy

In-Memory Cache (Single Instance)

import { LRUCache } from 'lru-cache';

const boardCache = new LRUCache<string, unknown>({
  max: 500,                    // Max 500 cached entries
  ttl: 60_000,                 // 1 minute TTL
  updateAgeOnGet: true,        // Extend TTL on access
  updateAgeOnHas: false,
});

async function getCachedBoard(boardId: string): Promise<MiroBoard> {
  const cacheKey = `board:${boardId}`;
  const cached = boardCache.get(cacheKey);
  if (cached) return cached as MiroBoard;

  const board = await miroFetch(`/v2/boards/${boardId}`);
  boardCache.set(cacheKey, board);
  return board;
}

// Invalidate on webhook events
function onBoardEvent(event: MiroBoardEvent) {
  boardCache.delete(`board:${event.boardId}`);
  boardCache.delete(`items:${event.boardId}`);
}

Redis Cache (Distributed)

import Redis from 'ioredis';

const redis = new Redis(process.env.REDIS_URL);

async function getCachedItems(boardId: string): Promise<MiroBoardItem[]> {
  const key = `miro:items:${boardId}`;
  const cached = await redis.get(key);
  if (cached) return JSON.parse(cached);

  // Fetch all items
  const items: MiroBoardItem[] = [];
  for await (const item of paginateItems(boardId)) {
    items.push(item);
  }

  // Cache for 2 minutes (boards with active editing should use shorter TTL)
  await redis.setex(key, 120, JSON.stringify(items));
  return items;
}

// Webhook-driven cache invalidation
async function invalidateOnEvent(event: MiroBoardEvent) {
  const keys = [
    `miro:items:${event.boardId}`,
    `miro:board:${event.boardId}`,
  ];
  await redis.del(...keys);
}

Controlled Concurrency for Bulk Operations

import PQueue from 'p-queue';

// Create items in parallel with controlled concurrency
async function bulkCreateStickyNotes(
  boardId: string,
  notes: Array<{ content: string; color: string; x: number; y: number }>
): Promise<string[]> {
  const queue = new PQueue({
    concurrency: 5,       // Max 5 parallel requests
    interval: 1000,       // Per-second window
    intervalCap: 10,      // Max 10 requests per second
  });

  const ids: string[] = [];

  for (const note of notes) {
    queue.add(async () => {
      const result = await miroFetch(`/v2/boards/${boardId}/sticky_notes`, 'POST', {
        data: { content: note.content, shape: 'square' },
        style: { fillColor: note.color },
        position: { x: note.x, y: note.y },
      });
      ids.push(result.id);
    });
  }

  await queue.onIdle();  // Wait for all to complete
  return ids;
}

// Example: Create a grid of 50 sticky notes efficiently
const notes = Array.from({ length: 50 }, (_, i) => ({
  content: `Note ${i + 1}`,
  color: 'light_yellow',
  x: (i % 10) * 250,
  y: Math.floor(i / 10) * 250,
}));

const createdIds = await bulkCreateStickyNotes(boardId, notes);
console.log(`Created ${createdIds.length} sticky notes`);

Connection Pooling

import { Agent } from 'https';

// Reuse TCP connections across requests
const httpsAgent = new Agent({
  keepAlive: true,
  maxSockets: 10,        // Max 10 concurrent connections to api.miro.com
  maxFreeSockets: 5,     // Keep 5 idle connections in pool
  timeout: 30000,        // Socket timeout
});

async function miroFetchPooled(path: string, options: RequestInit = {}) {
  // Note: Node.js native fetch doesn't support custom agents directly.
  // Use undici or node-fetch for connection pooling.
  const { default: fetch } = await import('node-fetch');

  return fetch(`https://api.miro.com${path}`, {
    ...options,
    agent: httpsAgent,
    headers: {
      'Authorization': `Bearer ${token}`,
      'Content-Type': 'application/json',
      ...options.headers,
    },
  });
}

Performance Monitoring

async function instrumentedMiroFetch<T>(
  operation: string,
  path: string,
  method = 'GET',
  body?: unknown,
): Promise<{ data: T; metrics: RequestMetrics }> {
  const start = performance.now();
  const response = await fetch(`https://api.miro.com${path}`, {
    method,
    headers: {
      'Authorization': `Bearer ${token}`,
      'Content-Type': 'application/json',
    },
    ...(body ? { body: JSON.stringify(body) } : {}),
  });

  const duration = performance.now() - start;
  const metrics: RequestMetrics = {
    operation,
    path,
    method,
    status: response.status,
    durationMs: Math.round(duration),
    rateLimitRemaining: parseInt(response.headers.get('X-RateLimit-Remaining') ?? '0', 10),
    rateLimitReset: response.headers.get('X-RateLimit-Reset') ?? '',
  };

  // Log for dashboarding
  console.log('[MIRO_PERF]', JSON.stringify(metrics));

  const data = response.status !== 204 ? await response.json() : null;
  return { data: data as T, metrics };
}

Optimization Checklist

Technique	Impact	Effort	When to Use
Type-filtered queries	High	Low	Always — ?type=sticky_note reduces payload
LRU cache	High	Low	Read-heavy workloads
Redis cache + webhook invalidation	Very High	Medium	Multi-instance deployments
Controlled concurrency	High	Low	Bulk create/update operations
Connection pooling	Medium	Low	High request volume
Cursor pagination	High	Low	Always — avoid loading full board

Error Handling

Issue	Cause	Solution
Cache stale data	Long TTL + frequent edits	Shorten TTL or use webhook invalidation
Concurrency errors	Too many parallel requests	Reduce concurrency in PQueue
Connection pool exhausted	Max sockets too low	Increase maxSockets
Pagination cursor expired	Long gap between pages	Re-start pagination from beginning

Resources

• Get Items on Board
• Rate Limiting
• LRU Cache
• p-queue

Next Steps

For cost optimization, see miro-cost-tuning.