Developers aim to transform an unused part of the script system into a tool that can verify cryptographic proofs, starting ...

An Opcode cache will insert itself into that interpretation / compile process and cache the compiled result into RAM for reuse. The next time a request for PHP content comes in, ...

Searching for holes in the opcode table. Some of the undocumented instructions are probably not useful. They are either impractical or duplicate a function you can already do another way.