摘要：
两个时间戳相减就是相差的毫秒{"task_name":"VERTEX_LABEL:1:node","task_progress":0,"task_create":1577969459291,13位，毫秒级别"task_status":"running","task_update":1577969459291,"task_retries":0,"id":8,"task_type":"remove_s
两个时间戳相减就是相差的毫秒
{ "task_name": "VERTEX_LABEL:1:node", "task_progress": 0, "task_create": 1577969459291, 13位，毫秒级别 "task_status": "running", "task_update": 1577969459291, "task_retries": 0, "id": 8, "task_type": "remove_schema", "task_callable": "com.baidu.hugegraph.job.schema.VertexLabelRemoveCallable"}