I know about java script that can run on java machine so it might run
in firebird too (in the close future)
http://www.mozilla.org/rhino/

but the new kid on the block is v8 from google but it needs to be integrated

http://code.google.com/apis/v8/intro.html

seems to be quite fast at java script with the v8 engine
http://blog.chromium.org/2008/09/google-chromes-need-for-speed_02.html


http://limi.net/articles/google-chrome-benchmarks-and-more
http://community.zdnet.co.uk/blog/0,1000000567,10009139o-2000331777b,00.htm
http://jrm.cc/articles/717-google-chrome-javascript-benchmarks
http://blogs.zdnet.com/hardware/?p=2507
http://news.cnet.com/8301-1001_3-10030888-92.html

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developer flamerobin.org