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Full Discussion: Moving XML tag/contents after specific XML tag within same file
Top Forums Shell Programming and Scripting Moving XML tag/contents after specific XML tag within same file Post 303021775 by stomp on Thursday 16th of August 2018 02:34:05 PM
Old 08-16-2018
Quote:
Filesystems will cache the first 10 MB read, so second read will be amazingly fast(er).
Of course. I assume cache is voiding any significant normal read times here. I can create additional processing overhead by reading in too small portions or improve performance by reading larger chunks. This is good, because so now the times here are processing times only.

Quote:
This was not done to compare ruby or awk per se, just to point out not to limit yourself to certain path, but use the right tool for the task.
My curiosity here is NOT "the right tool for the right job" at the moment. My point is: Is [some high-level-programming-language] too bloated and not able to compete in this single task with awk in terms of speed? If not, how much it is behind?


I already tested the same algorithm which is used for awk here in ruby. It's roughly 3 times faster(still 2-3 times slower than awk), but far less elegant than the awk code. That's a first interesting insight. Along with the other realization that line based processing seems to be a lot faster than my chunk-based processing. I've got an idea too, what of my codeparts are a worse and it is good to see actually how much the difference for those "little" things is.
Last edited by stomp; 08-16-2018 at 03:49 PM..
 

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LEARN ABOUT OSX

xml::parser::style::tree

Parser::Style::Tree(3)					User Contributed Perl Documentation				    Parser::Style::Tree(3)

NAME

       XML::Parser::Style::Tree

SYNOPSIS

	 use XML::Parser;
	 my $p = XML::Parser->new(Style => 'Tree');
	 my $tree = $p->parsefile('foo.xml');

DESCRIPTION

       This module implements XML::Parser's Tree style parser.

       When parsing a document, "parse()" will return a parse tree for the document. Each node in the tree takes the form of a tag, content pair.
       Text nodes are represented with a pseudo-tag of "0" and the string that is their content. For elements, the content is an array reference.
       The first item in the array is a (possibly empty) hash reference containing attributes. The remainder of the array is a sequence of tag-
       content pairs representing the content of the element.

       So for example the result of parsing:

	 <foo><head id="a">Hello <em>there</em></head><bar>Howdy<ref/></bar>do</foo>

       would be:
		    Tag   Content
	 ==================================================================
	 [foo, [{}, head, [{id => "a"}, 0, "Hello ",  em, [{}, 0, "there"]],
		     bar, [	    {}, 0, "Howdy",  ref, [{}]],
		       0, "do"
	       ]
	 ]

       The root document "foo", has 3 children: a "head" element, a "bar" element and the text "do". After the empty attribute hash, these are
       represented in it's contents by 3 tag-content pairs.

perl v5.16.2							    2011-05-24						    Parser::Style::Tree(3)
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