Question 1

How do I profile database queries with Prophiler in Phalcon?

Accepted Answer

Register the QueryAggregator with the profiler or use the PDO/Doctrine decorators as shown in the README; this automatically tracks all queries and displays aggregated metrics in the toolbar without manual benchmarking.

Question 2

Prophiler vs Xdebug for PHP performance profiling?

Accepted Answer

Prophiler is tailored for Phalcon with a browser toolbar and aggregated metrics, ideal for real-time debugging, while Xdebug is a general-purpose PHP profiler with lower-level insights but requires external tools like KCacheGrind and lacks Phalcon-specific integration.

Question 3

Can I use Prophiler with Laravel or Symfony?

Accepted Answer

Not directly; Prophiler is designed for Phalcon and relies on its DI container and events. For other frameworks, you'd need to adapt the setup or use built-in profiling tools like Laravel Debugbar or Symfony Profiler.

Question 4

How to add custom data collectors for specific metrics?

Accepted Answer

Implement the DataCollectorInterface to create your collector, then add an instance to the toolbar using addDataCollector(), allowing you to display custom data like request details or business logic stats.

Question 5

Does Prophiler work in production without the toolbar?

Accepted Answer

Yes, you can disable the toolbar rendering and use the profiler for logging or aggregate data collection, but performance overhead from benchmarking and adapters should be monitored, as it's primarily development-focused.

Question 6

How to integrate Prophiler with Elasticsearch for request profiling?

Accepted Answer

Decorate your Elasticsearch client with ClientDecorator, passing the profiler instance; this automatically benchmarks all search and index operations, with results viewable in the timeline and aggregations.

Prophiler

What is Prophiler?

Overview

Use Cases

Best For

Found a gem we're missing?

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions