StrBuilder is slow
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Key: LANG-523
URL: https://issues.apache.org/jira/browse/LANG-523
Project: Commons Lang
Issue Type: Improvement
Affects Versions: 2.4
Reporter: Stefan Zeller
I need a faster StringBuffer for java 1.4 branch.
So I tested StrBuffer. The result is not sufficient as it is 500 times slower
than StringBuffer. The problem is that currently the StrBuilder increases the
buffer size by the length of the string that thought to be appended.
Changing this strategy to provide the double of the needed buffer size brings
the performance near to the StringBuilder.
Here the times (the average of four runs in ms) for the Testcase attached.
Where MyStrBuilder is the pathed version of StrBuilder
startStringBuffer: 105.25
startStrBuilder: 5863.75
startStringBuilder: 55
startMyStringBuilder: 54
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