String to char-array in Java

For those curious Java versus LS. It's lightning fast:

String to char[]: 15ms, string length, 700 000

Added to the string concatenation "benchmark"

String concatenation with a Java agent

Here are the results from string concatenation in Java:
Standard concatenation (75 000 concatenations): 192.594s, string length, 300 000.

java.lang.StringBuffer-concatenation (75 000 concatenations): 0.062s, string length, 300 000.

RTI-concatenation (75000 concatenations): 1.765s, string length, 300 000.

The best in LS, 75 000 concatenations, 0.25s. The numbers aren't directly comparable, as I'm running on different hardware than Julian.

By "Standard" concatenation, I mean bigString += string. Standard concatenation and RT-concatenation is slower in Java than in LS. Using Java's native StringBuffer class, is a lot faster than any of the competitors in LS (so far).

I'm not surprised that Java's StringBuffer beats Julian's array-based StringBuffer-class in LS, as Sun probably puts a lot more effort into optimization of the language than IBM does with LS.

My test ran on Notes 7.02, which I think runs version 1.4 of the Java runtime. Newer versions of Java may be even faster.

My Java-skills are mediocre at best. Let me know if my test-methodology is wrong in any way.

>> Code for the test

Redim performance

Out of curiosity/"challenge" from Julian, I did a little test of ReDim performance.

I'm not that familiar with redimming arrays, so someone let me know if this way of testing is bad.

Result:

Code:


Percentwise, the difference is humongous, but in seconds, not that big of a difference.

>> Code as text