Php Timer Laravel Package

Getting Started

Install the package with composer require phpunit/php-timer. Import the SebastianBergmann\Timer\Timer class and start/stop timing around any code block. The most immediate use case is benchmarking critical paths — e.g., testing the performance of database queries, API calls, or algorithmic changes during development or in CI. Start by calling $timer->start(), run your code, then call $timer->stop() to get a Duration object with human-readable (asString()) and numeric (asSeconds(), asMilliseconds(), etc.) representations.

Implementation Patterns

• Micro-benchmarking in tests: Use the Timer inside PHPUnit tests (especially integration or feature tests) to assert performance constraints — e.g., ensure a slow method doesn’t regress beyond a threshold.
• CLI script profiling: In Laravel console commands, wrap expensive operations (like data imports or report generation) with Timer to log elapsed time and memory usage via ResourceUsageFormatter.
• Middleware timing: In web requests (e.g., custom middleware), use resourceUsageSinceStartOfRequest() to prepend timing and memory stats to responses for performance monitoring (especially useful in staging/development).
• Continuous validation: Pair with CI (e.g., GitHub Actions) to fail builds if new code exceeds expected timing budgets, catching performance regressions early.

Gotchas and Tips

• PHP version sensitivity: The package drops support for older PHP versions in minor releases (e.g., 9.0.0 removed PHP 8.3 support — note: likely a typo in docs; PHP 8.3 is newer than 8.2). Always match your project’s PHP constraint to compatible versions via composer require phpunit/php-timer:^8.
• Nanosecond overflow risk: On 32-bit systems, very long-running timers may cause integer overflow in asNanoseconds() — avoid nanosecond precision for operations > ~4 seconds unless on 64-bit.
• Memory measurement Caveats: $_SERVER['REQUEST_TIME_FLOAT'] (used by resourceUsageSinceStartOfRequest()) is unreliable in CLI or when using SAPIs that don’t set it; prefer explicit start()/stop() for accuracy.
• Custom output formatting: Extend ResourceUsageFormatter or build your own wrapper to inject performance metrics into logs or structured reporting (e.g., JSON in health checks).
• Testing performance-sensitive code: Use Duration comparisons in unit tests — e.g., $this->assertTrue($duration->asSeconds() < 0.1) — but be sure to warm up the JVM (if applicable) and run tests in isolation to reduce noise.