go有自己的调度器，所以在语言级别实现了并发，
图：https://blog.csdn.net/xclyfe/article/details/50562349
https://blog.csdn.net/RA681t58CJxsgCkJ31/article/details/103258253?utm_medium=distribute.pc_relevant.none-task-blog-OPENSEARCH-2.not_use_machine_learn_pai&depth_1-utm_source=distribute.pc_relevant.none-task-blog-OPENSEARCH-2.not_use_machine_learn_pai