Summary
Jason investigates the performance differences between regular constexpr and static constexpr variables through detailed benchmarks across GCC, Clang, and MSVC. He discovers that while GCC may optimize small (<144 bytes) non-static constexpr data slightly better at high optimization levels, static constexpr consistently performs better in unoptimized builds and with larger data structures across all compilers. Clang even optimizes both approaches identically, confirming Jason's recommendation to prefer static constexpr as the safer default in most cases.