Parallelize independent operations

When writing concurrent code, always execute independent operations in parallel rather than sequentially to improve performance and responsiveness. Using parallel execution patterns can significantly reduce waiting time for I/O-bound operations.

For API calls or file operations that don’t depend on each other:

// Instead of sequential execution:
const entitlements = await this.getEntitlements(session.accessToken, tokenEntitlementUrl);
const chatEntitlements = await this.getChatEntitlements(session.accessToken, chatEntitlementUrl);

// Prefer parallel execution:
const [entitlements, chatEntitlements] = await Promise.all([
  this.getEntitlements(session.accessToken, tokenEntitlementUrl),
  this.getChatEntitlements(session.accessToken, chatEntitlementUrl)
]);

When implementing operations that can take variable time to complete:

1. Consider using Promise.race() to process results as they arrive
2. Always respect cancellation tokens in long-running operations
3. Include proper cleanup mechanisms after parallel execution

Remember that excessive parallelism can lead to resource contention, so balance parallelism with the available system resources. For CPU-bound tasks, consider using worker threads or a task queue to prevent blocking the main thread.