Thanks for the suggestion
On 14/09/2020 22:13, Thangalin wrote:
Hey list,
JFreeSVG uses DecimalFormat to convert double values to strings. Ryū
is a fast double-to-string conversion algorithm that has a simple
drop-in replacement. The performance gains were substantial.
Batik also uses DecimalFormat for the exact same reason and thus would
also benefit significantly from an upgrade. Specifically:
https://github.com/apache/xmlgraphics-batik/blob/trunk/batik-svggen/src/main/java/org/apache/batik/svggen/SVGGeneratorContext.java#L426
Using Java's formatter:
--- 3089912936 ns (10.04%), 309 samples
[ 0] jdk.internal.math.FloatingDecimal$BinaryToASCIIBuffer.dtoa
[ 1] jdk.internal.math.FloatingDecimal.getBinaryToASCIIConverter
[ 2] jdk.internal.math.FloatingDecimal.getBinaryToASCIIConverter
[ 3] java.text.DigitList.set
[ 4] java.text.DecimalFormat.doubleSubformat
[ 5] java.text.DecimalFormat.format
[ 6] java.text.DecimalFormat.format
[ 7] java.text.NumberFormat.format
[ 8] org.jfree.svg.SVGGraphics2D.geomDP
Using Ryū more than doubles throughput:
--- 7429730977 ns (23.92%), 743 samples
[ 0] org.jfree.svg.util.RyuDouble.doubleToString
[ 1] org.jfree.svg.SVGGraphics2D.geomDP
A Java implementation is available online:
https://github.com/ulfjack/ryu/blob/master/src/main/java/info/adams/ryu/RyuDouble.java
Attached is a variation that allows control over precision.
Generating these strings is performed everywhere throughout the svggen
code, so tweaking this part of the code base should see significant
gains.
Cheers everybody!
---------------------------------------------------------------------
To unsubscribe, e-mail: general-unsubscr...@xmlgraphics.apache.org
For additional commands, e-mail: general-h...@xmlgraphics.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: general-unsubscr...@xmlgraphics.apache.org
For additional commands, e-mail: general-h...@xmlgraphics.apache.org
