C++ Team Blog

C++ tutorials, C and C++ news, and information about Visual Studio, Visual Studio Code, and Vcpkg from the Microsoft C++ team.

performance - C++ Team Blog

Visual Studio 2022 Performance: Faster C++ Source Code Indexing

November 15, 2022 Nov 15, 2022 11/15/22
Victor Ciura
Building on top of our performance wins in Visual Studio 2022 version 17.3, we are excited to announce additional improvements in version 17.4. Whether you are a game developer, work with large codebases, or have solutions with many C++ projects, your development experience in Visual Studio 2022 17.4 will feel even faster. In 17.4 we ...

The /fp:contract flag and changes to FP modes in VS2022

December 14, 2021 Dec 14, 2021 12/14/21
Gautham Beeraka (Intel Americas Inc)
The /fp:contract flag and changes to FP modes in VS2022 In this blog we will cover a new feature we have added to the MSVC version 17.0 compiler in VS2022 that impacts the generation of Floating-Point contractions such as Fused Multiply Add (FMA) instructions. We will cover how FMA contractions are supported in pre-VS2022 MSVC compiler ...

2x-3x Performance Improvements for Debug Builds

May 7, 2021 May 7, 2021 05/7/21
Pranav Kant
We have made substantial runtime performance improvements in the x86/x64 C++ compiler for Visual Studio's default debug configuration. For Visual Studio 2019 version 16.10 Preview 2, we measure 2x - 3x speedup for programs compiled in debug mode. These improvements come from reducing the overhead introduced by runtime checks (/...

JCC Erratum Mitigation in MSVC

February 4, 2020 Feb 4, 2020 02/4/20
Gautham Beeraka (Intel Americas Inc)
The content of this blog was provided by Gautham Beeraka from Intel Corporation. Intel recently announced Jump Conditional Code (JCC) Erratum which can occur in some of its processors. The MSVC team has been working with Intel to provide a software fix in the compiler to mitigate the performance impact of the microcode update that prevents ...