Bug 849087

+++ This bug was initially created as a clone of Bug #723944 +++

Description of problem: It isn't effective to rewrite whole content of file for every log entry.
Every log of any log entry calls:
<code>
output = open(journal, 'wb')
output.write(newdoc.toxml().encode('utf-8'))
output.close()
</code>
Where newdoc is DOM of whole log which is parsed for every log of log entry.
So step for writing of every log entry are:
1. parse whole log file to DOM <- very resources consuming
2. add log entry
3. save DOM to file(practically save new file) <- very resource consuming

I recommend to add just XML elements at the end of the file for every log entry and at the end clean up the log by SAX or something similar because DOM parsing is very resources consuming.

Version-Release number of selected component (if applicable):
beakerlib-1.3-1.fc14.noarch

--- Additional comment from pmuller on 2011-07-22 08:51:48 EDT ---

Yeah. I've once measured the effect of this nastiness on performance against an prototype in-memory representation (a daemon keeping journal in memory, communication via sockets => no parsing/saving), and found out the current implementation starts to measurably differ from the daemon @ ~800-1000 records. Most of the tests are not so big, so we dropped the idea of rewriting the journal at that time.

Currently, there is an effort to rewrite the journal to be handled by a daemon, and XML just one output format of an object internal representation.

--- Additional comment from endoflife on 2012-08-16 12:51:49 EDT ---

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