location = /shared {
	content_by_lua_block {
		local dict=ngx.shared.dog;
		local n1=ngx.now()
		for i=1,100000 do
		       dict:add("hello",1)
		       dict:get("hello")
		end_
		local n2=ngx.now()
		ngx.say("n1 : "..tostring(n1).." n2:"..tostring(n2))
	}
}

上面这个location，当请求在循环体中访问 共享内存时，worker进程是否有可能会切换执行其它的请求？还是当前请求一直占用着worker进程？