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deep_go/lessons/allocator/arena_problem_2/main.go

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package main
// GOEXPERIMENT=arenas go run main.go
// go run -tags goexperiment.arenas main.go
import (
"arena"
)
func main() {
mem := arena.NewArena()
defer mem.Free()
slice := arena.NewSlice[int](mem, 0, 5)
slice = append(slice, 1, 2, 3, 4, 5)
slice = append(slice, 6) // moved to heap
}