From: Scott Crosby <scrosby@cs.rice.edu> Result is identical numbers but not binary-identical because of trailing 0 digits in the output. Speedup is cumulative with binary format and fixed hash table. --- src/uk/me/parabola/splitter/OSMWriter.java | 19 +++++++++++++++---- 1 files changed, 15 insertions(+), 4 deletions(-) diff --git a/src/uk/me/parabola/splitter/OSMWriter.java b/src/uk/me/parabola/splitter/OSMWriter.java index 03c7d52..c42ce52 100644 --- a/src/uk/me/parabola/splitter/OSMWriter.java +++ b/src/uk/me/parabola/splitter/OSMWriter.java @@ -215,7 +215,6 @@ public class OSMWriter { checkFlush(22); writeString(Double.toString(value)); } - /** Write a double truncated to OSM's 7 digits of precision * * TODO: Optimize. Responsible for >30% of the runtime after other using binary @@ -223,10 +222,22 @@ public class OSMWriter { */ private void writeDouble(double value) throws IOException { checkFlush(22); - writeString(numberFormat.format(value)); - return; + // Punt on some annoying specialcases + if (value < -200 || value > 200 || (value > -1 && value < 1)) + writeString(numberFormat.format(value)); + else { + if (value < 0) { + writeChar('-'); + value = -value; + } + + int val = (int)Math.round(value*10000000); + StringBuilder s = new StringBuilder(Integer.toString(val)); + s.insert(s.length()-7, '.'); + writeString(s.toString()); + } } - + private void writeInt(int value) throws IOException { checkFlush(11); index += Convert.intToString(value, charBuf, index); -- 1.7.2.3