好像比较有趣，程序比较小，还没有时间看。据作者说性能不错：

"All I can tell you is that on my Pentium(R) 4 CPU 1.70GHz 

with 256 KB Cache and 256 MB RAM running Linux 2.4 and KDE-2, 

Qu is generally faster than Perl-5.6, Python-2.3 and Ruby-1.8. 

It is significantly slower than C, of course."

支持Exception和OO，比较有趣的是Exception的处理，下面是它给出的例子：