Performance intensive string splitting and manipulation in java
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Published on 2010-05-31T03:35:04Z
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2010/05/31
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What is the most efficient way to split a string by a very simple separator?
Some background:
I am porting a function I wrote in C with a bunch of pointer arithmetic to java and it is incredibly slow(After some optimisation still 5* slower). Having profiled it, it turns out a lot of that overhead is in String.split
The function in question takes a host name or ip address and makes it generic:
123.123.123.123->*.123.123.123
a.b.c.example.com->*.example.com
This can be run over several million items on a regular basis, so performance is an issue.
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