To comment on the following update, log in, then open the issue: http://www.openoffice.org/issues/show_bug.cgi?id=42462 Issue #:|42462 Summary:|extremely poor rendering performance Component:|Drawing Version:|680m77 Platform:|Other URL:| OS/Version:|Linux Status:|NEW Status whiteboard:| Keywords:| Resolution:| Issue type:|DEFECT Priority:|P3 Subcomponent:|code Assigned to:|wg Reported by:|mmeeks
------- Additional comments from [EMAIL PROTECTED] Thu Feb 10 12:37:29 -0800 2005 ------- With the attached spreadsheet - which implements approximately 250 list-boxes in a single sheet [ a cut-down version of a real-world use case ], we get staggeringly bad performance. * A big chunk of this seems to be the cost of instantiating the list-box - which (it seems) involves lots of X-server traffic some of it of very dubious usefulness [ setting window titles of unlikely-to-be-used floating windows etc. ] * Another chunk I imagine is possibly vcl not scaling very nicely to having a thousand-or-so peers of the one window; at destruction time we have a huge slow-down but perhaps that's via call-backs or somesuch. * scrolling is also really direly performing :-) * The main cause of the evilness though I think is the SdrPageView - which insists on instantiating (I assume 4 times over - due to the double sheet split ], hundreds of occluded controls. My profiles show time being consumed down this sort of path: SdrPageView ImpInsertControl() -> UnoControlContainer::addControl -> UnoListBoxControl::createPeer -> ListBox::ListBox etc. I'd be interested in an acceptable design to accelerate this; for example - it seems to me rather futile doing all this work immediately, when we could perhaps move the body of ImpInsertControl (wrt. control construction & placement) inside the SdrUnoControlRec - and instantiate all of that weight, only when the SdrUnoControlRec object becomes visible. Unfortunately given my limited understanding how how any of it works - it's rather difficult to work out what's going on; pwrt. the co-ordinate systems involved. I infer from the 'view' in 'SdrPageView' that there must be a per-view translation applied to all controls - to allow views to have different origins, but - that appears no-where to be the case. Either way - I'm interested in tackling this issue, but - will need some advice first. --------------------------------------------------------------------- Please do not reply to this automatically generated notification from Issue Tracker. Please log onto the website and enter your comments. http://qa.openoffice.org/issue_handling/project_issues.html#notification --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
