Hi, FYI I will run profilers on this test case to compare Oracle JDK8 vs OpenJDK11... Will then give you my analysis.
Cheers, Laurent Le mer. 26 sept. 2018 à 23:51, Philip Race <philip.r...@oracle.com> a écrit : > Interesting and I assume that it was somewhat less in JD8u ? > Off the top of my head that is one thing that didn't change in any big way > since JDK 8u. > > Perhaps something has changed so that it is now [considered] needed > whereas before > it was not? So did it go from zero percent to 29% or from 10% to 29% ? > > But even that doesn't on it own account for everything. > 29% of 8 seconds would be about 2.5 seconds and doesn't explain going from > < 3 seconds to 8 seconds .. we are still missing at least 2.5 seconds .. > > > -phil. > > On 9/26/18, 11:08 AM, Daniel Persson wrote: > > 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 >> >>
