Stuff Michael Meeks is doing
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This is my (in)activity log. You might like to visit my employer
Novell which is an amazing company, and also
Dell who in days of yore provided me with a
free laptop for Gnome development / conferences.
Also if you have the time to read this sort of stuff you could enlighten
yourself by going to Unraveling Wittgenstein's net or if
you are feeling objectionable perhaps here.
Older items:
2009: (
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2008: (
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2007: (
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2006,
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2002,
2001,
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1999,
legacy html
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Up early, breakfast & off to the Eurostar. Poked at gconf
performance some more. Several oddnesses. Firstly it seems that
%gconf-tree.xml is 50% composed of the space
character (pretty-printing, with 8 stop space indents). Knocked up
a trivial patch
to accelerate writing and save ~2Mb (of 5) here.
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It seems that the split out localisation code doesn't apply
to keys with no default - leaving the localisations inline, adding
25% (700K) to the size of the main tree we parse. Then of course we
have lots of redundancy from duplicate mtime and schema nodes that
could be cascaded into their parents, then there are un-necessary
tags for eg. boolean default values, and empty descriptions. A quick
breakdown might be:
| Size/Kb | Description |
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| 5221 | size of my pre-existing %gconf-tree.xml |
| 2717 | literal white 'space' |
| 729 | l10n for items with no default key |
| 332 | mostly redundant mtime and schema attributes |
| 1234 | (magic) size after removing all of the above |
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Of course, there is still more fat that can be removed there,
not least in the in-memory storage structures - and clearly in terms of
reducing CPU-usage, removing redundant attributes and elements should be
a priority.
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Stopped off at the British Library briefly, lunch with Karen,
happily passing through London. More gconf hacking on the train,
saw the news in Cambridge - seemingly a large fire in Beijing fire,
apparently rather nearby both RH & Novell's offices.
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Knocked up a patch to inherit mtime from a parent node - to
drastically reduce the number of attributes we need to parse; got to
work on collapsing the schema attributes similarly.
In case it's not painfully obvious: the reflections reflected here are my
own; mine, all mine ! and don't reflect the views of Novell, The
Lithuanian Gov't or Arnold Schwarzenegger. It's also important to
realise that I'm not in on the Swedish Conspiracy.
Occasionally people ask for formal photos for conferences,
bio.
or fun.
Michael Meeks (michael.meeks@novell.com)
