> Message: 1 > Date: Fri, 8 Jun 2012 01:25:30 +0000 > From: Chang Im <[email protected]> > To: "[email protected]" <[email protected]> > Subject: [xml] xmlNodeDump performance > Message-ID: <[email protected]> > Content-Type: text/plain; charset="us-ascii" > > Hi, > > I am new to libxml and XML itself. We are using version 2.7.7. > > I am looking into performance issue related to xmlNodeDump of entire tree. > The size of XML file is about 20 MB and it takes about 60+ seconds with > xmlNodeDump. > > Do you really need this tree dump in memory? If the ultimate goal is to have this on a file, the functions in xmlsave (xmlSaveToFd, xmlSaveToFilename,...) should be preferred. -W
> Oprofiling showed memcpy as the hit. > > The xmlBufferResize takes MINLEN increments and that is defined as 4000 in > xmlIO.c > When MINLEN is changed to 400,000 to see the effect, the time taken is > changed to about 1 sec from 60+ seconds. > > When MINLEN is changed to 40000, time taken is changed to 7 seconds. > > Is this something needs to be tuned properly to support large XML files? > If so, any good suggestions? > > Thanks. > Chang Im | Software Engineer > WatchGuard Technologies, Inc. >
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