Hey,
I think the main reason for that is still the virtualization only for rows. The
columns don't get virtualized which is ofc a problem in the case of a lot of
columns. So even if there is an additional factor which reduces the speed
there, you wont get it working fast enough if you want to have 160 Columns.
But unfortunately, I don't have a good advice for you to tackle that issue. The
only thing I can show you is a prototype / showcsae of our new virtual
infrastructure which is the foundation of the new virtual widgets like the list
and the tree:
http://demo.qooxdoo.org/current/demobrowser/index.html?qxenv:demobrowser.withTests:true#virtual~Table.html
It shows how a table could look. But using that would mean a lot of work
because some things (almost everything) is simply missing in comparison to the
table widget.
Regards,
Martin
Am 12.10.2011 um 07:15 schrieb NickTee:
Hi Guys,
I've noticed that the performance of tables seems to degrade almost
exponentially with the number of columns in the table.
I realise there is a bug relating to this issue already
(http://bugzilla.qooxdoo.org/show_bug.cgi?id=4237) but I think the problem
is something other than what's described in that bug report.
What makes me think there is another issue at play is, when you create a
table with 10 rows of 16 columns the table generates almost instantly. But
if you create a table with one row, and 160 columns the table takes so long
to generate that the browser issues a warning about a long running script.
I don't think the issue is that only the rows are virtualised, because in
both the aforementioned cases I had the browser window maximized and all the
cells were visible, meaning in each case there was a total of 160 cells
created.
I've created a playground example to illustrate the point. Try different
combinations of rows & columns and you can see the table doesn't handle
large numbers of columns at all well.
http://tinyurl.com/3hfx8sg
Thanks for the great framework, any advice is sincerely appreciated.
Nick Tindall
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All the data continuously generated in your IT infrastructure contains a
definitive record of customers, application performance, security
threats, fraudulent activity and more. Splunk takes this data and makes
sense of it. Business sense. IT sense. Common sense.
http://p.sf.net/sfu/splunk-d2d-oct
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