My team is having some problems with the image rendering speed of certain PDF file. For most of the pdf files we are handling, it only took seconds to create an image of the file but for certain pdf, it took more than 6 minutes.
We have tried the following version of pdfbox-app-x.x.x.jar, and it seems that 1.8.x is more efficient at rendering the image. (1)1.8.13 - 1.5 mins (2)2.0.5 - 6.18 mins (3)2.0.8 - 6.35 mins However, due to the problem that we had with some files where some Japanese characters were not correctly rendered using 1.8.13, we had to use 2.0.5 as the production version. I tried inserting some debug code in the PDFToImage class (ver2.0.5) to determine the bottle-necked process, and it seems "renderer.renderImageWithDPI" was taking up most of the time. ========================== Java version: 1.7.0_72 PDFBox version: 2.0.5 Command line: java -jar ./pdfbox-app-2.0.5.jar PDFToImage -time -startPage 1 -endPage 1 ./sample_slow.pdf File: https://goo.gl/WEMM2X ========================== The full version of the PDF is quite large, so the linked file above is the cropped version (the page which we are having problem rendering). The cropped version is created using PDFSplit command line. This is my first time using the mailing list, should I just create a JIRA ticket requesting help instead of addressing the mailing list regarding this problem? Any help is deeply appreciated. Thank you in anticipation. Regards, Soon Keong Tan ---------------------- [email protected]
