多執行緒長時間執行,不會造成 memory 變大的正確寫法,此寫法是李維寫的範例程式碼,因我發信詢問過,感謝李維的回信.-Long-running multi-threaded and will not cause the correct wording of the larger memory, this wording is sample code written in Livy, because I asked the letter, thank Levi s reply.