Class Layout Copyright © 2020 by Stephen C. Dewhurst and Daniel Saks 1 Class Layout Steve Dewhurst Semantics Consulting, Inc. www.stevedewhurst.com 1 Copyright © 2020 by Stephen C. Dewhurst and Daniel Daniel Saks C++ Classes  Only non-static data declarations in a class definition add anything to the size of class objects. class HR { public: ~~~ void terminator(Salary *, Hourly *, Temp *); private: Stephen C. Dewhurst and Daniel Saks 1 7Class Layout Copyright © 2020 by Stephen C. Dewhurst and Daniel Saks 2 sizeof(Class Object)  sizeof applied to the HR class yields the same result as sizeof applied

performance, we typically think about the function logic. We’ll see that a well designed function API can have an even larger impact.How will we compare performance? ● Benchmarks at this low level are 60 ret 0 I N T 50Itanium C++ ABI 3.1.3.1 Non-trivial Return Values If the return type is a class type that is non-trivial for the purposes of calls, the caller passes an address as an implicit parameter problem 51The problem Itanium C++ ABI 3.1.3.1 Non-trivial Return Values If the return type is a class type that is non-trivial for the purposes of calls, the caller passes an address as an implicit parameter

Apache APISIX: How to implement plugin orchestration in API Gateway wenming@apache.org Apache APISIX VP Ming Wen 温铭 • Co-founder @ api7.ai • VP and PMC member, Apache APISIX • committer, Apache Apache APISIX • Custom plugin development in API Gateway • Generate APISIX plugins automatically • The future of API Gateway Apache APISIX • Cloud Native API Gateway （https://github.com/apache/apisix） Zero-Trust gateway Technology Architecture Custom plugin development in API Gateway Difficulties of gateway implementation • API Gateway is not an out-of-the-box infra project, which is different from

the important data structures and concepts? Prior work in the GraphBLAS community, C API Overview of our draft C++ API How might this interoperate with standard C++, graph library proposal? 4[DISTRIBUTION the important data structures and concepts? Prior work in the GraphBLAS community, C API Overview of our draft C++ API How might this interoperate with standard C++, graph library proposal? 5[DISTRIBUTION the important data structures and concepts? Prior work in the GraphBLAS community, C API Overview of our draft C++ API How might this interoperate with standard C++, graph library proposal? 6[DISTRIBUTION

蚂蚁金服 API Gateway Mesh 思考与实践 靳文祥（花名：贾岛） 蚂蚁金服 高级技术专家1/21 /01 /02 /03 API Gateway Mesh 的定义 蚂蚁金服 API Gateway Mesh 实践 云原生 API Gateway 的思考2/21 API Gateway Mesh 的定义 /013/21 LB\Ingress API Gateway POD Sidecar App POD Traffic Control Plane K8S Cluster API Gateway in Service Mesh4/21 API Gateway Service Mesh vs 南北流量（内外） API Gateway vs Service Mesh A infrastructure to decouple the application Service Mesh is Patterns SofaRPC API Gateway MQ Client Service Code6/21 LB\Ingress API Gateway Sidecar App POD Sidecar App POD Traffic Control Plane Cluster API Gateway Mesh An infrastructure

APACHE APISIX的全流量API网关 温铭, 来自一家在远程工作方式下商业化开源项目的创业公司(支流科技), 担任CEO&联合创始人, Apache 顶级项目APISIX的PMC主席, Skywalking开源项目的贡献者(commiter)。在创业之前, 在360做企业安全, 360开源委员会的发起人, 腾讯的TVP, TARS基金会的TOC成员, 在安全领域有四十多个专利, 最近三年全 加速了技术落地。新的时代中每个公司的技术都是非常重要的组成部分, 在一个商业竞争激烈的 时代, 公司愈早的占据技术顶峰愈是能够占据商业顶峰。网关作为云原生入口, 是掌握云原生的一个必经 之地, 是开启"财富"的密钥。 微服务和 API 网关的演进 从2014-2015年, 谷歌搜索引擎上"微服务"关键字的搜索趋势直线上 升 在单体架构上, 任一请求都会负载到整个的单体服务集群上 在微服务架构上, 对应请求会负载到对应的微服务子服务集群上 间隔离、降低故障率 但是同样的带来的一些问题: 接口之间通用的功能重复开发、膨胀的 服务数量、难以管理 使用API网关模式 使用API网关进行API聚合 使用API网关实现灰度发布 使用API网关实现服务熔断 与传统API网关的功能 • 让 API 请求更安全、更高效的得到处理 • 覆盖 Nginx 的所有功能：反向代理、负载均衡 • 动态上游、动态 SSL 证书、动态限流限速

>=1.8,<2 • numpy >=1.8,<2|1.9 • numpy 1.8.1 py27_0 • numpy=1.8.1=py27_0 Version ordering The class VersionOrder(object) implements an order relation between version strings. Version strings can contain entry-points."conda"] my-conda-plugin = "my_plugin" Conda plugins use cases The new conda plugin API ecosystem brings about many possibilities, including but not limited to: • Custom subcommands • Support arbitrary environment variables that may be necessary for their operation. You can also use the config API to set environment variables. When installing Anaconda, you have the option to “Add Anaconda to my

>=1.8,<2 • numpy >=1.8,<2|1.9 • numpy 1.8.1 py27_0 • numpy=1.8.1=py27_0 Version ordering The class VersionOrder(object) implements an order relation between version strings. Version strings can contain entry-points."conda"] my-conda-plugin = "my_plugin" Conda plugins use cases The new conda plugin API ecosystem brings about many possibilities, including but not limited to: • Custom subcommands • Support arbitrary environment variables that may be necessary for their operation. You can also use the config API to set environment variables. Activation prepends to PATH. This only takes effect when you have the

look at Integrating applications. {% render_block "js" %} {% load menu_tags %}

class="nav"> {% show_menu 0 100 100 100 %}

Integrating applications All the following sections creates a plugin model class; these all inherit from the cms.models.pluginmodel.CMSPlugin base class. Note django CMS plugins inherit from cms.models.pluginmodel.CMSPlugin (or a sub- class thereof) and not models models.Model]. Create and run migrations: The Plugin Class Now create a new file cms_plugins.py in the same folder your models.py is in. The plugin class is responsible for providing django CMS with the necessary

menu_tags library first: {% load menu_tags %} The menu we use in mysite/templates/base.html is:

class="nav"> {% show_menu 0 100 100 100 %}

The options control the levels of the site hierarchy import Poll class PollPluginModel(CMSPlugin): poll = models.ForeignKey(Poll, on_delete=models.CASCADE) def __str__(self): return self.poll.question This creates a plugin model class; these inherit from the cms.models.pluginmodel.CMSPlugin base class. Note django CMS plugins inherit from cms.models.pluginmodel.CMSPlugin (or a sub- class thereof) and not models.Model [https://docs.djangoproject