Rob and Jason are joined by Emery Berger from the University of Massachusetts Amherst. They first discuss updates to GCC and the September ISO mailing. Then they talk to Emery Berger about Performance tooling and how improvements in Performance should be measured. News New C++ features in GCC 10 September C++ ISO Mailing std::exchange patterns: Fast, Safe, Expressive and Probably Underused include Meeting C++2020 scholarship Links Plenary: Performance Matters - Emery Berger - CppCon 2020 Quantifying the Performance of Garbage Collection vs. Explicit Memory Management Stabilizer Coz Sponsors PVS-Studio. Write #cppcast in the message field on the download page and get one month license PVS-Studio is now in Compiler Explorer! Free PVS-Studio for Students and Teachers