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Concurrency Mastery

Master Go's signature strength — goroutines, channels, select, sync primitives, and context.

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Goroutines

A goroutine is a lightweight, cooperatively-scheduled function execution managed...

Go
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Channels

Channels are typed, goroutine-safe communication pipes. `make(chan T)` creates a...

Go
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Select

`select` waits on multiple channel operations simultaneously, executing the firs...

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sync.WaitGroup

`sync.WaitGroup` coordinates a set of goroutines: `Add(n)` registers n tasks, ea...

Go
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sync.Mutex and sync.RWMutex

When goroutines share mutable state (instead of communicating via channels), a m...

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context.Context

The `context` package propagates deadlines, cancellation signals, and request-sc...

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Worker Pools

A worker pool limits concurrency: instead of launching one goroutine per task (w...

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sync/atomic

The `sync/atomic` package provides lock-free, hardware-atomic operations on prim...

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Pipelines

A pipeline is a series of stages connected by channels, where each stage receive...

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sync.Once

`sync.Once` guarantees a function runs exactly once, no matter how many goroutin...

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sync.Pool

`sync.Pool` is a cache of temporary objects that can be reused to relieve pressu...

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Channel Direction

A channel type can be restricted to send-only (`chan<- T`) or receive-only (`<-c...

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The Race Detector

A data race occurs when two goroutines access the same memory concurrently and a...

Go