PHP Interpreters written in GO (and C)

Comparison of stack and register implementations of interpreters for a subset of PHP. The interpreters were tested using predefined php-files (fib.php, prime.php...). There are 4 versions: 1 register-interpreter written in GO, 2 stack-interpreters written in GO, and 1 stack interpreter written in C. An overview of the design choices (and errors) can be found in my presentation.

prerequesites

• go compiler
• optional (for v3): gcc
• goyacc (https://godoc.org/golang.org/x/tools/cmd/goyacc)
• nex (http://www-cs-students.stanford.edu/∼blynn/nex/)
• stringer (https://godoc.org/golang.org/x/tools/cmd/stringer)

Directories

The version-directories (v1, v2, v3) each contain scripts to run the interpreter (including the compiler) - e.g.:

cd v1
./mphp_stack.sh ../benchmarks/fib.php

Note: The programs might have to be recompiled (depending on system). Run make in the respective compiler_stack/compiler_reg and interpreter_stack/interpreter_reg directories.

v1

Version 1 of stack and register interpreters (and compilers) written in GO.

v1_analyse

Version 1 interpreters with ability to record command runtimes.

v2

Version 2: New stack interpreter (reduced command set - no block entries or exists) written in GO.

v3

Version 3: New stack interpreter - this time written in C using direct threaded code. This interpreter uses the same compiler and command-set as v2.

benchmarks

The results of the different benchmarks. A detailed (but not very well annotated) overview can be found in bm.ods. Also contains the source files for the 3 benchmarks.