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wanghenshui · Jan 7, 2024 · 14a845d · 14a845d
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diff --git a/README.md b/README.md
@@ -24,9 +24,9 @@ RSS使用仓库的release RSS [链接](https://github.com/wanghenshui/cppweeklyn
 
 ## 2024
 
-| [141](./posts/141.md) | [142](./posts/142.md) | [143](./posts/143.md) | [144](./posts/144.md) |                    |                    |                    |                    |                    |                    |
+|  | |  | |  [145](./posts/14.md)                  |                    |                    |                    |                    |                    |
 | ------------------ | ------------------ | ------------------ | ------------------ | ------------------ | ------------------ | ------------------ | ------------------ | ------------------ | ------------------ |
-| [131](./posts/131.md) | [132](./posts/132.md) | [133](./posts/133.md) | [134](./posts/134.md) | [135](./posts/135.md) | [136](./posts/136.md) | [137](./posts/137.md) | [138](./posts/138.md) | [139](./posts/139.md) | [140](./posts/140.md) |
+|  | | | |  | |  |  | | |
 
 ---
 
@@ -94,8 +94,8 @@ RSS使用仓库的release RSS [链接](https://github.com/wanghenshui/cppweeklyn
 - Amnesia x2
 - fengyiee木马
 - 陈青松
-- 黄亮Anthony x5
+- 黄亮Anthony x9
 - Captain
 - Anien
 - jerry
-- HNY x2
+- HNY x3
diff --git a/posts/145.md b/posts/145.md
@@ -0,0 +1,232 @@
+---
+layout: post
+title:  第145期
+---
+# C++ 中文周刊 第145期
+
+[周刊项目地址](https://github.com/wanghenshui/cppweeklynews)
+
+公众号
+
+<img src="https://wanghenshui.github.io/cppweeklynews/assets/code.png" alt=""  width="30%">
+
+qq群 [点击进入](https://qm.qq.com/q/6NGizNPyG4)
+
+RSS https://github.com/wanghenshui/cppweeklynews/releases.atom
+
+欢迎投稿，推荐或自荐文章/软件/资源等评论区留言
+
+本期文章由 黄亮Anthony HNY 赞助
+
+2024 01 07
+
+---
+
+## 资讯
+
+标准委员会动态/ide/编译器信息放在这里
+
+[编译器信息最新动态推荐关注hellogcc公众号 本周更新 2024-01-03 第235期](https://mp.weixin.qq.com/s/uf1Sa5YZDZn9DZIP6zIX3Q)
+
+
+## 文章
+
+#### [现代分支预测：从学术界到工业界](https://zhuanlan.zhihu.com/p/675456587?utm_psn=1727335890022830082)
+
+看个乐呵, 了解概念对于CPU运行还是有点理解的
+
+#### [LLVM中指令选择的流程是啥样的？](https://zhuanlan.zhihu.com/p/675543769?utm_psn=1727335764789129217)
+
+
+LLVM知识，学吧，都是知识，早晚碰到
+
+#### [【数据结构】Jemalloc中的Radix Tree](https://zhuanlan.zhihu.com/p/675177015?utm_psn=1727335511331631104)
+#### [解析Jemalloc的关键数据结构](https://zhuanlan.zhihu.com/p/671608149?utm_psn=1727335367877697536)
+jemalloc最新知识，学吧
+
+#### [Optimizing the unoptimizable: a journey to faster C++ compile times](https://vitaut.net/posts/2024/faster-cpp-compile-times/)
+
+编译很慢，怎么抓？
+
+```cpp
+#include <fmt/core.h>
+
+int main() {
+  fmt::print("Hello, {}!\n", "world");
+}
+// c++ -ftime-trace -c hello.cc -I include -std=c++20
+```
+
+ftime-trace的数据可以放到浏览器的tracing里，比如 chrome://tracing/
+
+![](https://wanghenshui.github.io/assets/2024-trace.png)
+
+firefox可以用这个 https://profiler.firefox.com/from-url/https%3A%2F%2Fvitaut.net%2Ffiles%2F2024-hello-before.json/marker-chart/?globalTrackOrder=0&hiddenLocalTracksByPid=65312-fwx3&thread=0&timelineType=category&v=10
+
+我没看懂他是怎么分析出头文件的耗时的，总之，把string前向声明一下
+
+```cpp
+
+#ifdef FMT_BEGIN_NAMESPACE_STD
+FMT_BEGIN_NAMESPACE_STD
+template <typename Char>
+struct char_traits;
+template <typename T>
+class allocator;
+template <typename Char, typename Traits, typename Allocator>
+class basic_string;
+FMT_END_NAMESPACE_STD
+#else
+# include <string>
+#endif
+```
+
+但是这种接口编译不过
+
+```cpp
+
+template <typename... T>
+ FMT_NODISCARD FMT_INLINE auto format(format_string<T...> fmt, T&&... args)
+    -> basic_string<char> {
+   return vformat(fmt, fmt::make_format_args(args...));
+ }
+```
+
+因为`basic_string<char>`找不到实现，怎么破？
+
+```cpp
+template <typename... T, typename Char = char>
+ FMT_NODISCARD FMT_INLINE auto format(format_string<T...> fmt, T&&... args)
+    -> basic_string<Char> {
+   return vformat(fmt, fmt::make_format_args(args...));
+ }
+
+```
+
+然后这个操作就省掉了大量编译时间
+
+#### [Why doesn’t my code compile when I change a shared_ptr<T>(p) to an equivalent make_shared<T>(p)?](https://devblogs.microsoft.com/oldnewthing/20240103-00/?p=109228)
+
+结构是这样的
+
+```c++
+class WidgetContainer : IWidgetCallback
+{
+    //    
+};
+
+    auto widget = std::shared_ptr<Widget>(new Widget(this));
+```
+能不能换成make_shared？不能，因为是private继承
+
+怎么破？
+```cpp
+
+    auto widget = std::make_shared<Widget>(
+        static_cast<IWidgetCallback*>(this));
+```
+#### [c++ tip of week ](https://github.com/tip-of-the-week/cpp)
+
+```cpp
+struct foo {
+  int a{};
+  int b{};
+  int c{};
+};
+
+static_assert(3 == std::size(std::meta::nonstatic_data_members_of(^foo)));
+```
+
+#### [Inside STL: The deque, implementation](https://devblogs.microsoft.com/oldnewthing/20230810-00/?p=108587)
+
+deque msvc实现有坑爹的地方
+
+|                             | gcc                                                                              | clang                                                                                               | msvc                                                              |
+| ----------------------------- | ---------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------- |
+| Block size                  | as many as fit in 512 bytes but at least 1 element                               | as many as fit in 4096 bytes but at least 16 elements                                               | power of 2 that fits in 16 bytes but at least 1 element           |
+| Initial map size            | 8                                                                                | 2                                                                                                   | 8                                                                 |
+| Map growth                  | 2×                                                                              | 2×                                                                                                 | 2×                                                               |
+| Map shrinkage               | On request                                                                       | On request                                                                                          | On request                                                        |
+| Initial first/last          | Center                                                                           | Start                                                                                               | Start                                                             |
+| Members                     | block** map; size_t map_size;
+iterator first;
+iterator last;                     | block** map;
+block** first_block;
+block** last_block;
+block** end_block;
+size_t first;
+size_t size; | block** map; size_t map_size;
+size_t first;
+size_t size;          |
+| Map layout                  | counted array                                                                    | simple_deque                                                                                        | counted array                                                     |
+| Valid range                 | Pair of iterators                                                                | Start and count                                                                                     | Start and count                                                   |
+| Iterator                    | T* current;
+T* current_block_begin;
+T* current_block_end;
+block** current_block; | T* current; block** current_block;                                                                  | deque* parent;
+size_t index;                                      |
+| `begin()`/
+ `end()` | Copy`first`and`last`.                                                    | Break`first`and`first + size`into block index and offset.                                   | Break`first`and`first + size`into block index and offset. |
+| Spare blocks                | Aggressively pruned                                                              | Keep one on each end                                                                                | Keep all                                                          |
+
+ block size太小了
+
+
+
+#### windows相关
+
+- [How to allocate address space with a custom alignment or in a custom address region](https://devblogs.microsoft.com/oldnewthing/20231229-00/?p=109204)
+- [How do I prevent my ATL class from participating in COM aggregation? DECLARE_NOT_AGGREGATABLE didn’t work](https://devblogs.microsoft.com/oldnewthing/20240101-00/?p=109214)
+- [The case of the vector with an impossibly large size](https://devblogs.microsoft.com/oldnewthing/20240105-00/?p=109242)
+
+## 视频
+
+#### [What we've been (a)waiting for? - Hana Dusíková - Meeting C++ 2023 ](https://www.youtube.com/watch?v=_Q9tiEa-jG4&ab_channel=MeetingCpp)
+
+介绍协程并写了个co curl 有点意思，视频我后面传一下
+
+代码在这里 https://github.com/hanickadot/co_curl
+
+## 开源项目更新/新项目介绍
+
+- [fmt](https://github.com/fmtlib/fmt/releases) 10.2更新，支持duration打印 %j 还支持这么玩
+
+```cpp
+#include <fmt/chrono.h>
+
+int main() {
+  fmt::print("{}\n", std::chrono::days(42)); // prints "42d"
+}
+```
+
+- [mp-units 2.1.0 released!](https://mpusz.github.io/mp-units/2.2/blog/2023/12/09/mp-units-210-released/)
+
+编译期物理计算的
+
+- [nanobind](https://nanobind.readthedocs.io/en/latest/benchmark.html) 一个python binding，速度性能都不错，群友kenshin推荐
+- [asteria](https://github.com/lhmouse/asteria) 一个脚本语言，可嵌入，长期找人，希望胖友们帮帮忙，也可以加群753302367和作者对线
+- [Unilang](https://github.com/linuxdeepin/unilang) deepin的一个通用编程语言，点子有点意思，也缺人，感兴趣的可以github讨论区或者deepin论坛看一看。这里也挂着长期推荐了
+- [gcc-mcf](https://gcc-mcf.lhmouse.com/) 懂的都懂
+
+## 工作招聘
+
+https://job.toutiao.com/s/i8Tv36Jf
+字节杭州虚拟机v8研发
+
+字节的音视频团队，主要负责剪映上的音视频/非线性编辑相关工作，业务前景也比较好，目前有三个方向的岗位
+
+- 桌面端音视频研发 https://job.toutiao.com/s/i8enPrw5
+- 多端音视频引擎研发 https://job.toutiao.com/s/i8enr7Es
+- C++工程基础架构研发 https://job.toutiao.com/s/i8enjTHT
+
+base北上广深杭都可以，薪资open，有兴趣的同学可以通过链接投递
+
+## 互动环节
+
+新的一年开始了，本周刊也走过了三个年头，希望大家都健康我也继续保持更新下去
+
+---
+
+[本文永久链接](https://wanghenshui.github.io/cppweeklynews/posts/145.html)
+
+如果有疑问评论最好在上面链接到评论区里评论，这样方便搜索，微信公众号有点封闭/知乎吞评论
diff --git a/posts/template.md b/posts/template.md
@@ -26,6 +26,9 @@ RSS https://github.com/wanghenshui/cppweeklynews/releases.atom
 
 `TODO replate code with carbon https://carbon.now.sh/`
 
+`TODO https://discu.eu/weekly/candcpp/2024/01/`
+
+`TODO https://www.meetingcpp.com/blog/blogroll/`
 ---
 
 ## 资讯
@@ -48,13 +51,23 @@ RSS https://github.com/wanghenshui/cppweeklynews/releases.atom
 
 `TODO fix link then remove this line`
 
-## 开源项目
+## 开源项目介绍
 
 - [asteria](https://github.com/lhmouse/asteria) 一个脚本语言，可嵌入，长期找人，希望胖友们帮帮忙，也可以加群753302367和作者对线
 - [Unilang](https://github.com/linuxdeepin/unilang) deepin的一个通用编程语言，点子有点意思，也缺人，感兴趣的可以github讨论区或者deepin论坛看一看。这里也挂着长期推荐了
 - [gcc-mcf](https://gcc-mcf.lhmouse.com/) 懂的都懂
 
-## 新项目介绍/版本更新
+## 热门库最近更新了什么
+
+seastar
+
+folly
+
+fmt
+
+brpc？
+
+async_simple
 
 ## 工作招聘
 
@@ -63,5 +76,3 @@ RSS https://github.com/wanghenshui/cppweeklynews/releases.atom
 ---
 
 [本文永久链接](https://wanghenshui.github.io/cppweeklynews/posts/NNN.html)
-
-如果有疑问评论最好在上面链接到评论区里评论，这样方便搜索，微信公众号有点封闭/知乎吞评论