A lightweight goroutine pool implementation for Go that manages concurrent job execution with configurable workers and job queue size.
grpool is a lightweight goroutine pool implementation for the Go programming language that manages concurrent job execution. It solves the problem of uncontrolled goroutine creation by providing a pool of reusable workers that process jobs from a configurable queue. The library helps prevent resource exhaustion and makes concurrent programming more manageable in Go applications.
Go developers building concurrent applications who need to manage goroutine lifecycle and prevent resource leaks, particularly those implementing worker patterns or processing pipelines.
Developers choose grpool for its simplicity, minimal API surface, and idiomatic Go design that integrates seamlessly with existing code. Unlike more complex solutions, it provides just enough functionality to implement worker pools without unnecessary overhead.
Lightweight Goroutine pool
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Easy setup with NewPool specifying worker count and queue size, as demonstrated in the README examples for quick integration.
Uses channel-based job submission via pool.JobQueue, aligning with Go's concurrency patterns and making it familiar to Go developers.
Graceful resource release with defer pool.Release() ensures goroutines are cleaned up, preventing leaks in long-running applications.
Provides pool.WaitAll() and pool.JobDone() for synchronizing execution, shown in the waiting example to coordinate job finishes.
Developers must manually call JobDone() for each job, which is error-prone and can lead to deadlocks if omitted, as seen in the examples.
Jobs are submitted as void functions, requiring external mechanisms like error channels or logging, adding boilerplate for robust applications.
Pool size and queue capacity are fixed at creation with no runtime adjustment, limiting adaptability to changing workloads.