Buffered channel
A buffered channel is a channel with finite capacity that can hold values and allow communication without an immediately corresponding operation while space or queued values remain.
Learn Go with Pocket-Sized Projects
A buffered channel is a Go channel that can hold a bounded number of values without an immediately corresponding receive.
- How it is used
- Coordinates goroutines, prevents initial sends from blocking, and provides controlled buffering for concurrent workloads and tests.
- How deep it goes
- Explains construction, capacity, FIFO order, blocking, testing, and sizing tradeoffs, but defers deeper channel coordination patterns.
- Examples
- Uses completion notifications, concurrent cooking tasks, maze exploration, and a three-slot channel in unit tests.
- What you can do after
- Build it from scratch with make, select capacity, avoid blocked initial sends, and test queued concurrent results.
Read how Learn Go with Pocket-Sized Projects explains buffered channel →
Go in Action, Second Edition
A buffered channel is a channel with storage for a specified number of values that can be sent before a send operation blocks.
- How it is used
- Queues articles and feed URLs so producers can submit work before consumers are ready to process each value.
- How deep it goes
- Explains capacity and send blocking through channel construction and application examples, without detailing channel internals.
- Examples
- Demonstrates ten-slot article buffering, a five-slot application feed queue, and a 100-slot worker-pool queue.
- What you can do after
- Build it from scratch by choosing a channel capacity and using the channel as a queue between feed producers and workers.
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Learn Concurrent Programming with Go
A buffered channel is a Go channel with finite storage capacity that permits sends or receives to proceed without an immediate counterpart while capacity or queued values remain.
- How it is used
- Uses buffered channels for goroutine message passing when senders can temporarily outpace receivers.
- How deep it goes
- Explains capacity, queue buildup, ordered delivery, and blocking, then relates implementation to queues, semaphores, and mutexes.
- Examples
- Demonstrates a capacity-three integer channel, six fast sends, a one-per-second receiver, and a -1 stopping value.
- What you can do after
- Operate/configure buffered channels by selecting capacity, observing queue length, coordinating receivers, and waiting for completion.
Read how Learn Concurrent Programming with Go explains buffered channel →
Related concepts
- channel capacityconfigured by · Channel capacity is the maximum number of values a buffered Go channel can hold before a send blocks.
- channelkind of · A channel is a typed Go communication and synchronization mechanism through which goroutines send and receive values.
- channelkind of · A channel is a medium, mechanism, or pathway through which information or messages are conveyed between participants or endpoints.
- bufferinguses · Buffering is the temporary storage of data or work between production and consumption to accommodate differences in processing rates, absorb interruptions, or improve transfer efficiency.
- queuecontrasts with · A queue is an ordered collection that holds items for retrieval or processing, typically removing them in the order they were added.
- benchmarkused by · A benchmark is a defined task, dataset, workload, procedure, or reference measure used to assess or compare performance or capability under specified criteria or conditions.
These guides are generated from the text of Manning books by Manning's knowledge graph and link to the sections they draw on. The full books are available on liveBook and at manning.com.