主题：【倡议】Java SE 5.0和.NET 2.0擂台赛 -- Highway

这是我从网上找来的，本来应该以文摘的方式转载，但是西西河的文章标题长度限制使得它成为不可能，我只好把它附在内容里了。

.NET 2.0 and Java 1.5 for numerical computing

Going ahead with my numerical algorithms translation, I started to wonder if I was going to win something in performance. Is .NET 2.0 going to be faster than Java 1.5 for numerical computing? To find out, I downloaded the SciMark2 benchmark from the http://math.nist.gov site and I translated it to C# using Visual C# Express, at this point I didn't try to understand (let alone enhance) the code, only to get it working in C# (except a couple of obvious changes like using Array.CopyTo() to copy arrays). Anyway, these are the results I got with Java 1.5 Beta 2 in my portable (2.8 GHz Mobile Intel Pentium 4 CPU):

And these are the results I got with .NET 2.0 Beta 1:

The results are in Mflops so Whidbey seems to be roughly 50% better than Tiger. Of course, these results are very preliminary and they will vary from machine to machine, so you can download the C# SciMark2 from http://www.logicstudio.net/Net2005/SciMark2.zip (the translation is awful right now and barely use C# idioms but, hey, it runs!) Give it a try and let me know how it goes.

Doing benchmarks is always dangerous, and doing it with betas even more so, so I run the benchmarks with Java 1.4.2_05 and got this:

And with .NET 1.1.4322:

For both platforms the production versions are better than the betas but note I run the tests in the same machine but with *different* Windows XP installations so don't jump into conclusions. In any case the difference between Java and .NET seems to be consistent.