Development tools for Zephyr on STM32Workbench for Zephyr: VS Code extension to set up, build, flash and debug Zephyr applications on STM32.Devicetree manager: browse, edit and visualize Zephyr devicetree, STM32CubeMX-like for Zephyr.
This old post helped me very much! A clean build took 2.30 min. Disabling the virus scanner for gcc took it back to 1.30 min and enabling parallel build was 35 sec.
System Workbench: why is parallel build not enabled by default?