Page "Parrot virtual machine" Paragraph 7

Virtual machines such as the Java virtual machine and the current Perl 5 virtual machine are also stack based.

Parrot developers see Parrot's inclusion of registers as an advantage, as it therefore more closely resembles a hardware design, allowing the vast literature on compiler optimization to be used in generating bytecode for the Parrot virtual machine that could run at speeds closer to machine code.

Other register-based virtual machines have inspired parts of Parrot's design, including LLVM, the Lua VM and Inferno's Dis.