How do I reuse buffers to reduce allocations in Go?

In Go, managing memory efficiently is crucial for performance, especially in high-load applications. One common technique to reduce allocations is to reuse buffers. Instead of allocating new bytes for every operation, you can use a pre-allocated buffer or implement your own buffer pool to serve multiple requests.

By reusing buffers, you decrease the number of allocations, which not only improves performance but also reduces the pressure on the garbage collector.

Example


        package main

        import (
            "bytes"
            "fmt"
            "sync"
        )

        var bufferPool = sync.Pool{
            New: func() interface{} {
                return new(bytes.Buffer)
            },
        }

        func main() {
            // Get a buffer from the pool
            buf := bufferPool.Get().(*bytes.Buffer)
            // Reset the buffer for reuse
            buf.Reset()

            // Use the buffer
            buf.WriteString("Hello, World!")
            fmt.Println(buf.String())

            // Put the buffer back into the pool
            bufferPool.Put(buf)
        }

How do I reuse buffers to reduce allocations in Go?

Example

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How do I reuse buffers to reduce allocations in Go?

Example

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