CoordinateWriter could use more efficient formatting for most real world
coordinates
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Key: GEOT-2041
URL: http://jira.codehaus.org/browse/GEOT-2041
Project: GeoTools
Issue Type: Improvement
Components: core main
Affects Versions: 2.5.0, 2.6-M0
Reporter: Andrea Aime
Assignee: Andrea Aime
Fix For: 2.5.0, 2.6-M0
DecimalFormat is a well known performance sink, see for example "Java
Performance Tuning". Without going into the algorithm proposed in the book,
whose usability in a open source library is dubious at best due to copyright
issues, we can use Double.toString() for most of the real world coordinates.
Double.toString() already generates the desired format for numbers between
10e-3 and 10e7, that is, the vast majority of numbers used in real world
geographic and projected srs, and rounding can be performed by simple double
math. So, at least for that range, skip DecimalFormat and use a more efficient
approach.
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