[XOM-interest] StackOverflowError compiling XOM
Elliotte Harold
elharo at metalab.unc.edu
Mon Jul 14 09:10:17 EDT 2008
cowwoc wrote:
> There should definitely be a better way of mapping characters than
> dumping a whole slew of if statements into a method. Have you tried
> asking on the Java discussion forums?
>
There are such ways and I use them, but the goal is maximum efficiency
at runtime, not working around compiler bugs. This is a real hot spot in
XOM and some serious effort has gone into optimizing every last
millisecond out of this. Check out my chapter in Beautiful Code for the
details sometime.
The simple fact is that the most efficient way is table lookup (O(1))
based on carefully constructed switch statements with no holes. If it's
legal code and a compiler can't handle it, then get a better compiler.
I'm not going to slow XOM down to work around compiler bugs.
--
Elliotte Rusty Harold elharo at metalab.unc.edu
Refactoring HTML Just Published!
http://www.amazon.com/exec/obidos/ISBN=0321503635/ref=nosim/cafeaulaitA
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