Hi Phil What the PDFBox team told me it could have something to do with color mapping.
And my quick profiling shows that the code spends 29% of the time inside of java.awt.image.ColorConvertOp.filter on java 11 But I'll open a issue. Best regards Daniel On Wed, Sep 26, 2018, 19:33 Phil Race <philip.r...@oracle.com> wrote: > Multiple pieces are changing across these releases. > > Is it the JPEG writing ? Is it freetype vs t2k (font performance) > is it harfbuzz vs icu (text layout), is it marlin vs ductus > (rasterization) ? > > So it is very hard to say with any certainty what the cause of the > difference is .. or > why 10 got so much better than 9 .. even if still not back to JDK 8. > > Please file a bug at java.com. > > -phil. > > On 09/25/2018 10:42 PM, Daniel Persson wrote: > > Hi everyone, > > > > We render a lot of images with PDFBox with Java 1.8.0 and we want to > > upgrade to the current OpenJDK 11 but sadly we see some performance > > degradation switching over to OpenJDK. Anyone have a suggestion to > > remedy this issue, or can explain why it is slower? > > > > Using the PDFBox app current release downloadable from > > http://www-us.apache.org/dist/pdfbox/2.0.11/pdfbox-app-2.0.11.jar > > > > Running the command > > java -jar pdfbox-app-2.0.11.jar PDFToImage -time test.pdf > > > > We see the following result > > > > --------------------------------------------------------- > > java version "1.8.0_181" > > Java(TM) SE Runtime Environment (build 1.8.0_181-b13) > > Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode) > > Rendered 1 page in 2762ms > > --------------------------------------------------------- > > openjdk version "9.0.4" > > OpenJDK Runtime Environment (build 9.0.4+11) > > OpenJDK 64-Bit Server VM (build 9.0.4+11, mixed mode) > > Rendered 1 page in 8034ms > > --------------------------------------------------------- > > openjdk version "10.0.2" 2018-07-17 > > OpenJDK Runtime Environment 18.3 (build 10.0.2+13) > > OpenJDK 64-Bit Server VM 18.3 (build 10.0.2+13, mixed mode) > > Rendered 1 page in 4255ms > > --------------------------------------------------------- > > openjdk version "11" 2018-09-25 > > OpenJDK Runtime Environment 18.9 (build 11+28) > > OpenJDK 64-Bit Server VM 18.9 (build 11+28, mixed mode) > > Rendered 1 page in 4275ms > > --------------------------------------------------------- > > openjdk version "12-ea" 2019-03-19 > > OpenJDK Runtime Environment 19.3 (build 12-ea+11) > > OpenJDK 64-Bit Server VM 19.3 (build 12-ea+11, mixed mode) > > Rendered 1 page in 4399ms > > > > The pdf file used in this example can be downloaded from > > > https://drive.google.com/file/d/139wP6PDmmQ6KBTyeJTETIrplSuOUgFfG/view?usp=sharing > > > > Best regards > > Daniel > >
