I'm guessing that your file sample.xml, is around 300MB in size? Text::Template appears to require around 7 times the filesize in memory, to perform it's manipulations. This will obviously vary with the complexity and number of substitutions in the template, amongst other things. That's not a bug or a leak, just what it takes to do the job.

There is a work-around for an early Perl bug in T::Ts file handling that means that the file data gets temporarily duplicated on input, though this is swamped by memory requirements of later processing.

A suggestion. Read in the template file yourself, in a few smaller chunks and pass them to T::T as strings. It will require you to ensure that you don't break the file halfway through a piece of T::T markup, but that shouldn't be too onerous.

As far as T::T is concerned, everything outside of it's tags is just data. It will preserve it as is, but otherwise not inspect it, so it doesn't matter if you pass in broken chunks of XML, it will still process fine. This way you can read and write chunks serially and reassemble them in your own program space or another file, and you be able to reduce the peak memory consumption to whatever level fits your needs.

It might even process more quickly as you will be reusing memory already allocated to the process for the second and subsequent chunks, rather than getting more and more from the OS.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
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In reply to Re: memory leak by BrowserUk
in thread memory leak by camenix

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