34 lines
607 B
Go
34 lines
607 B
Go
package main
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import (
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"fmt"
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"runtime"
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"slices"
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"unsafe"
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)
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func printAllocs() {
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var m runtime.MemStats
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runtime.ReadMemStats(&m)
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fmt.Printf("%d MB\n", m.Alloc/1024/1024)
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}
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func main() {
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data := make([]int, 10, 100<<20)
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fmt.Println("data:", unsafe.SliceData(data), len(data), cap(data))
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printAllocs()
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temp1 := data[:10]
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fmt.Println("temp1:", unsafe.SliceData(temp1), len(temp1), cap(temp1))
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temp2 := slices.Clip(data) // data[:10:10]
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fmt.Println("temp2:", unsafe.SliceData(temp2), len(temp2), cap(temp2))
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runtime.GC()
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printAllocs()
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runtime.KeepAlive(temp1)
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runtime.KeepAlive(temp2)
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}
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