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Tilman Hausherr commented on PDFBOX-3429: ----------------------------------------- I realize my text from this morning wasn't really helpful - the classic profiler can find CPU or memory load but not excessive locking. I don't have a solution for that one, sadly. The google keywords are: java profiler lock contention. But I didn't find anything that would output what I really want, i.e. stack trace pairs. > Improve ExtractText Concurrency > ------------------------------- > > Key: PDFBOX-3429 > URL: https://issues.apache.org/jira/browse/PDFBOX-3429 > Project: PDFBox > Issue Type: Improvement > Components: Text extraction > Affects Versions: 2.0.1 > Environment: Win7, jdk1.8.0_60 x64 > Reporter: Luis Filipe Nassif > Priority: Minor > Labels: optimization > Attachments: cpu-pdfbox-2.0.1.png, cpu-pdfbox1.8.10.png > > > While testing Tika 1.13, which uses PDFBox 2.0.1, from a multithreaded text > extraction application, I noted cpu usage aroung 80% in my 6 core computer > when processing a dataset of ~75 thousands of pdfs (18GB). It took 5min25sec > to complete the text extraction. With Tika 1.10, which uses PDFBox 1.8.10, > cpu usage stays aroung 100%. It took 4min37sec to complete. The dataset is > read from a ramdrive, so there is no i/o bottleneck. I suspect there is some > new synchronization code that blocks the threads for a non trivial amount of > time, resulting in less cpu usage than before. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org