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https://issues.apache.org/jira/browse/PDFBOX-2882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14628339#comment-14628339
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Tim Allison edited comment on PDFBOX-2882 at 7/15/15 4:57 PM:
--------------------------------------------------------------
Tried both via InputStream and via file when I did the single shot run (useless
from true benchmark perspective, I know :( ) and got roughly the same #s.
Running multiple times shows much more variation with no-scratch-file on my
system. As in your numbers, there's a drop off after the first run...Java has
had its coffee by the second load.
On file, with pdfbox-2.0.0-20150715.011346-1543.jar (probably doesn't include
your latest/dev versions??)
||No Scratch||Scratch||
|2034|53510|
|1000|44791|
|1581|44990|
|846|43852|
|826|43559|
|1055|42974|
|625|43865|
|910|43049|
|632|44795|
|767|44112|
|| ||No Scratch||Scratch||
|Mean|1027.6|44949.7|
|Median|878|43988.5|
With PDFBox 1.8.9
||No Scratch Classic||Scratch Classic||Scratch NonSeq||
|864|1719|3290|
|393|687|1105|
|372|680|981|
|351|632|881|
|290|550|849|
|187|495|778|
|1078|592|764|
|214|474|772|
|306|471|764|
|234|535|908|
|| ||No Scratch Classic||Scratch Classic||Scratch NonSeq||
|Mean|428.9|683.5|1109.2|
|Median|328.5|571|865|
My take from this is that as of pdfbox-2.0.0-20150715.011346-1543.jar, the
2.0.0's non-scratch runs on this file are equivalent to 1.8.9's nonseq with
scratch (as required).
was (Author: [email protected]):
Tried both via InputStream and via file when I did the single shot run (useless
from true benchmark perspective, I know :( ) and got roughly the same #s.
Running multiple times shows much more variation with no-scratch-file on my
system. As in your numbers, there's a drop off after the first run...Java has
had its coffee by the second load.
On file, with pdfbox-2.0.0-20150715.011346-1543.jar (probably doesn't include
your latest/dev versions??)
||No Scratch||Scratch||
|2034|53510|
|1000|44791|
|1581|44990|
|846|43852|
|826|43559|
|1055|42974|
|625|43865|
|910|43049|
|632|44795|
|767|44112|
||No Scratch||Scratch||
|Mean|1027.6|44949.7|
|Median|878|43988.5|
With PDFBox 1.8.9
||No Scratch Classic||Scratch Classic||Scratch NonSeq||
|864|1719|3290|
|393|687|1105|
|372|680|981|
|351|632|881|
|290|550|849|
|187|495|778|
|1078|592|764|
|214|474|772|
|306|471|764|
|234|535|908|
||No Scratch Classic||Scratch Classic||Scratch NonSeq||
|Mean|428.9|683.5|1109.2|
|Median|328.5|571|865|
> Improve performance when using scratch file
> -------------------------------------------
>
> Key: PDFBOX-2882
> URL: https://issues.apache.org/jira/browse/PDFBOX-2882
> Project: PDFBox
> Issue Type: Improvement
> Components: Parsing
> Affects Versions: 2.0.0
> Reporter: Timo Boehme
> Assignee: Timo Boehme
> Priority: Minor
> Attachments: ScratchFile.java, ScratchFileBuffer.java
>
>
> The current scratch file implementation uses many direct I/O calls which
> slows down parsing compared with in-memory scratch buffer considerably.
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