A2 alex-2.0

Similar to Lua and Javascript, it includes a register-based virtual machine.

install

make
make install

:$ a2
A2 power by zixun.
>

Tutorial?

Run make to generate liba2.a library a2 executable program. you can write bound program by youself. or use test_a2 program interpreted scripts file at ./test/test_a2.

I wrote a simple command line program to explain A2 script. check detail at ./src/a2.c

Benchmark

I've compared to a lot of languages, such as lua, python, perl, php, ruby.

test on 5000 data will be insertion sorted. the test case is :

A2 file at     ./test/vm.a2
perl file at   ./test/tp.pl
python file at ./test/tpy.py
php file at    ./test/th.php
lua file at    ./test/t.lua and ./test/tlua.c
ruby file at   ./test/tr.rb

Performance testing

my machine configuration:

cpu: 2.4GHz Intel Core 2Duo 
OS: mac osX 
gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)

A2     1.7143 s
lua    2.6443 s
perl   9.7350 s
python 8.5539 s
php    4.8107 s
ruby   15 s

JIT

JIT use dynasm implementation. a2_jitx64.desc is source code.

the jit Performance testing

A2(not jit)   1.7143s
A2(with jit)  0.4560s

performance improvement of 73%, is 3.7 times that of not jit.

you can open #define A2_JIT at a2_conf.h, jit currently only supports x64 posix.

Question?

send me an email: [email protected]

wiki

home wiki: https://github.com/lvzixun/A2/wiki

PS

英语老师死得早，各位就凑合这看吧 -_-!