What is Laravel Octane?
Why Interviewers Ask This
Interviewers ask this to evaluate whether you have the depth of knowledge needed to mentor others and lead technical decisions. The expected answer goes beyond definitions into practical implications and real-world consequences.
Answer
Laravel Octane supercharges application performance by using high-performance application servers — Swoole or RoadRunner — to keep the Laravel application in memory between requests. In traditional PHP-FPM, the entire application bootstraps (loads service providers, binds services, reads config) on every request — wasting time. With Octane, the app is booted once and kept in memory; each request reuses the already-bootstrapped application, eliminating bootstrap overhead. Results: 10-30x faster throughput compared to PHP-FPM. Caveats: since state persists between requests, you must be careful with singleton-bound objects that may become stale or carry state. Octane provides tools like $app->flush() for cleanup. It also supports concurrent tasks via Swoole coroutines.
Pro Tip
If you're unsure about a detail, say so honestly and explain your reasoning. Interviewers respect candidates who can think through uncertainty rather than bluffing.