23 lines
410 B
Go
23 lines
410 B
Go
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package main
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import "unsafe"
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// SBO (Small Buffer Optimization)
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type SBO struct {
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size int64
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union [16]byte // 8B[pointer]8B[capacity]
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}
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func main() {
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var small SBO
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small.size = 10
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small.union = [16]byte{}
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var big SBO
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big.size = 1024
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pointer := (*[2048]byte)(unsafe.Pointer(&big.union))
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*pointer = [2048]byte{}
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capacity := (*int64)(unsafe.Add(unsafe.Pointer(&big.union), 8))
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*capacity = 2048
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}
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