Large Html conversion consume much memory

Hi guys,

I'm having an issue where converting a large HTML document to PDF is consuming a significant amount of memory. The HTML represents around 1200 pages, but the file size is only around 3MB.

When generating the PDF, I noticed my Java VM memory usage increasing up to around 1GB. I used a profiler to investigate further and found that a lot of byte arrays were being created during the PDF generation process. Most of the memory usage appeared to be occurring in calls to com.openhtmltopdf.css.newmatch.Condition#matches which involves java.lang.StringBuilder.toString or java.lang.StringBuilder.


I'm hoping someone may be able to provide some help or insights on how I could optimize this process to use less memory. Converting such a large number of HTML pages to PDF seems to be straining the memory usage and I want to find a more efficient way to handle it.

Really appreciate it!