Because you don't have a steady stream of carbs to fuel your brain. Protein at meals helps time-release the carbs for steady energy rather than up and down spikes. If you're relying only on fleeting foods, such as crackers or bread, you'll only experience short bursts of mental energy, followed by the fog.
About SonarQube SonarQube is an open source platform to perform automatic reviews with static analysis of code to detect bugs, code smells and security vulnerabilities on 20+ programming languages including Java, C#, JavaScript, TypeScript, C/C++, COBOL and more.
Qubes OS is a security-oriented operating system (OS). The OS is the software that runs all the other programs on a computer. Some examples of popular OSes are Microsoft Windows, Mac OS X, Android, and iOS. Qubes is free and open-source software (FOSS). This means that everyone is free to use, copy, and change the software in any way.