This document summarizes Bjarne Stroustrup's keynote at Cppcon 2016 and new features in Visual Studio 2015. It discusses improvements to build times with features like whole program optimization and linker optimizations. It also covers compiler optimizations like vectorization of control flow and loop-if unswitching. New C++17 language features and the standalone Visual C++ build tools are also mentioned. Finally, it demonstrates debugging and profiling improvements in Visual Studio 2015.

1. @himskim

2. Cppcon 2016 Keynote Bjarne Stroustrup

3. VS 2015? 좋겠죠
근데 우린 못바꿔요

4. 백만스물두

6. • Native Multi-targeting
• Round-tripping

7. https://msdn.microsoft.com/ko-kr/library/dn986839.aspx

8. Development Cycle

9. Edit
Build
Debug

10. Refactoring
Code generation
Quick Fixes
Intellisense

11. https://visualstudiogallery.msdn.microsoft.com/

14. Demo

15. Edit
Build
Debug

16. "Within C++ is a smaller, simpler,
safer language struggling to get out.“
- Bjarne Stroustrup

17. Major design decision

18. C++17
constexpr Expression SFINAE Two-phase lookup
Variable templates Extended constexpr
NSDMI for aggregates
coroutines modules concepts Nested namespace Folded expressions

19. Compile Fast & Link Fast
Generate Fast & Secure Code

20. • 더욱 빨라진 Whole Program Optimized builds

21. • 링커 개선 및 신규 옵션 제공
680
138
84
573
68
61
8
327
KINE C T S PO R TS R IV AL ( XBO X O NE ) F O R Z A ( XBO X O NE ) DE S TINY ( XBO X O NE ) C HR O ME
CLEAN LINK TIMES WITH VS2015 (SEC)
VS2013 RTM VS2015 RTM
• /Debug:fastlink
• /Zc:inline
• Incremental linking for
static libraries
• Linker multi-threading
VS2015 링커 신규 옵션

22. Vectorization of control-flow / Bit-test merging
void blackscholes(float* input, int *signArray, int n)
{
for (int i = 0; i < n; i++) {
float InputX = input[i];
int sign;
if (InputX < 0.0f) {
InputX = -InputX;
sign = 1;
} else {
sign = 0;
}
input[i] = InputX;
signArray[i] = sign;
}
}
mask = InputX < 0.0f ? 0xFFFFFFFF : 0;
InputX = (mask & -InputX) | (~mask & InputX);
sign = (mask & 1) | (~mask & 0);
Branch를 제거하여 최적화된 코드
벤치마크 테스트 결과
300%+ 속도 개선

23. • Loop-if unswitching
for (int i = 0; i < 100; i++)
if (some_invariant_condition)
...
Source code:
if (some_invariant_condition)
for (int i = 0; i < 100; i++)
...
Optimized as if:

24. • 그외

25. • /Guard:cf – 새로운 컴파일 스위치

26. • Intel Memory Protection Extension(MPX) 지원

27. Incredibuild and Visual Studio
6:32
4:42
0:47
Visual Studio IncrediBuild
(Predicted)
IncrediBuild
(With Helpers*)
Ace open source 빌드 벤치마크
일반적으로 10% 이상 빌드 속도 개선

28. • 독립 설치 가능한 compiler, libraries, scripts
• Standalone Compiler
• Visual Studio Code
- ext install cpptools
• Team Build Server
• Python/Node.js/Rust
독립 Visual C++ Build 도구 지원
http://landinghub.visualstudio.com/visual-cpp-build-tools

29. Demo

30. Edit
Build
Debug

31. •
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• Set next statement
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• PerfTips
• Integrated CPU Profiling
• Integrated Memory Profiling
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32. Demo

33. Visual Studio 2015 Video
Visual C++ 포팅 및 업그레이드 가이드
Stuck on an older toolset version? Move to Visual Studio 2015 without upgrading your
toolset
Visual C++ Build Tool
Debugging Tips and Tricks for C++ in Visual Studio
C++ Edit and Continue in visual studio 2015 update
Compiler improvement in vs 2015 update 3
MFC Dynamic Dialog Layout
Speeding up the Incremental Developer Build Scenario