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[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Performance issue XSL:FO
 First of all upgrade FOP software up to the latest version, performance was improved to some degree in the 0.20.5rc.I'm generating XML on the fly from my servlet (line# 9 - using jdom, reading from database) and after reading static XSL (line#7), I use transformer to do XSL:FO translation (line#21). However line#21 seems to be taking awfully long.... about 5 minutes for 1500 rows of records... Is there anyway to improve the performance? Thanks for your input in advance The rest is a stylesheet author responsibility - generate optimal fo structure. Here are some tips from FOP's faq[1]: # Avoid forward references. Forward references cause all pages from the page with the reference on to be held in memory until the page with the referenced element is encountered. Common forward references are table of contents at the beginning of the document and the "page N of TOTAL" in footers. Forward references may be required by the task, however, if you are getting a memory overflow you should at least check whether this is really as necessary as claimed. A TOC, for example, could often be placed at the end of the document without dimishing it's value too much, the paper can be reshuffled after printing, and you can use bookmarks in PDF. # Avoid large images, especially if they are scaled down. Scale them outside of FOP and use the already scaled images for the FOP run. For many image formats it is mainly the size of the image file which matters, not width*height, so you can try other means like using a higher compression rate. # Use multiple page sequences. FOP starts rendering after the end of a page sequence is encountered. While the actual rendering is done page by page, some memory allocated for other purposes could possibly be freed after the page sequence has been rendered. [1] http://xml.apache.org/fop/faq.html -- Oleg Tkachenko eXperanto team Multiconn Technologies, Israel XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list 
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