Locust 作为一款基于 Python 轻量化的性能测试工具，中小型的团队做接口压测还是比较方便的，直接编写接口事务脚本对后台接口进行测试；但有时测试需要让所有并发用户完成初始化后再进行压力测试，这就需要类似于 LoadRunner 中的集合点的概念，由于框架本身没有直接封装，google 后实践有效，分享出来：

Python 相关代码

from locust import events
from gevent._semaphore import Semaphore
all_locusts_spawned = Semaphore()
all_locusts_spawned.acquire()

def on_hatch_complete(**kwargs):
    all_locusts_spawned.release()

events.hatch_complete += on_hatch_complete

class TestTask(TaskSet):
    def on_start(self):
        """ on_start is called when a Locust start before any task is scheduled """
        self.login()
        all_locusts_spawned.wait()