amphp/parallel-functions
Wrap callables to run in parallel processes/threads with AMPHP. Provides helpers like parallelMap to execute CPU-heavy or blocking tasks concurrently; callable state must be serializable. Built for PHP 8.1+ with fibers-friendly concurrency.
This package directly enables critical product features requiring high-throughput batch processing without major architectural overhauls. It supports building features like real-time analytics dashboards (processing thousands of data points concurrently), automated content generation (e.g., mass image/video processing), and scalable API integrations (parallelizing external service calls). By abstracting process management, it reduces build vs. buy tradeoffs—replacing custom solutions that would require 3-6 weeks of engineering effort to develop and maintain. The MIT license ensures zero cost for enterprise use, while Amp's fiber-based foundation future-proofs our async strategy as we migrate to PHP 8.1+.
Adopt this when processing serializable tasks that are I/O-bound (e.g., HTTP requests, file ops) or CPU-heavy (e.g., image resizing, encryption) where sequential execution creates user-facing delays. Ideal for CLI environments like queue workers or cron jobs where process forking is supported. Avoid if: tasks involve non-serializable resources (database connections, file handles), you're on PHP <8.1, or your workload is small (<50ms per task) where process spawning overhead outweighs gains. Never use in web SAPIs (e.g., Apache/Nginx) due to process spawning limitations—only for dedicated CLI processes. If you already use amphp/http-client for non-blocking I/O, this package adds minimal value for pure HTTP tasks.
To executives: "This open-source package reduces batch processing time by 80-90% for critical features like user report generation and content pipelines—turning 10-minute waits into near-instant results. It costs nothing to implement and leverages existing PHP infrastructure, freeing engineering resources for revenue-generating work instead of reinventing parallel processing. With 279 GitHub stars and active maintenance, it’s battle-tested and low-risk."
To engineering: "We can integrate parallelMap in <2 hours for our image processing queue—replace sequential foreach loops with a one-line function call. It handles process management, error serialization, and pool sizing automatically. Key gotchas: ensure all closures use serializable data (avoid DB connections) and set worker pool limits (e.g., 8 workers) to prevent OOM. Works seamlessly with our Amp stack and Laravel queues. This gives us 10x throughput on CPU-heavy tasks without rewriting core architecture."
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