Memory leaks in Go - Unbounded resource creation

bounded-cache.go

var cache = map[int]int{}

func main() {
  for i:=0; ; i++ {
    // max items cache can hold is 1_000_000
    if len(cache) >= 1_000_000 {
      delete(cache, i-len(cache))
    }
    
    cache[i] = i
  }
}