Hi, we have an issue with rendering performance and I wonder if there are any common misusages of wicket when it comes to this.
When rendering a fully expanded tree with 160 top level nodes and mostly no subtrees (an expanded node is a forms with a bunch of labels and attributes) it takes about 20 seconds for the page to load (actually it's an Ajax request) and it seems that most of this time is spent when wicket renders the components. For one ot these 160 nodes, which has some sub nodes and forms, rendering takes about half a second. I'm using the RenderPerformanceListener from wicket-devutils to do the measuring and gets, for the entire expanded tree, over 22 000 "afterRender" rows in the log from the RenderPerformanceListener. This is in my opinion a huge number! - is it expected that rendering of so many components takes this amount of time? - is this amount a sign of that we are using wicket in the wrong way? Don't know if this makes any sense to anyone but this is the last lines of the log output for one of the top level nodes: 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node:content:component:objectViewerForm:objectSection:1:objectSectionContent:attributeRow:attributeRowCol:12:cell:attributeEditLabel' for 0ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node:content:component:objectViewerForm:objectSection:1:objectSectionContent:attributeRow:attributeRowCol:12:cell:attributeDisplayLabel' for 0ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node:content:component:objectViewerForm:objectSection:1:objectSectionContent:attributeRow:attributeRowCol:12:cell:attributeDisplay' for 0ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node:content:component:objectViewerForm:objectSection:1:objectSectionContent:attributeRow:attributeRowCol:12:cell:attributeFeedback' for 1ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node:content:component:objectViewerForm:objectSection:1:objectSectionContent:attributeRow:attributeRowCol:12:cell' for 2ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node:content:component:objectViewerForm:objectSection:1:objectSectionContent:attributeRow:attributeRowCol:12' for 2ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node:content:component:objectViewerForm:objectSection:1:objectSectionContent:attributeRow:attributeRowCol' for 26ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node:content:component:objectViewerForm:objectSection:1:objectSectionContent:attributeRow' for 27ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node:content:component:objectViewerForm:objectSection:1:objectSectionContent' for 27ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node:content:component:objectViewerForm:objectSection:1' for 27ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node:content:component:objectViewerForm:objectSection' for 28ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node:content:component:objectViewerForm' for 29ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node:content:component' for 29ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node:content' for 36ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:node' for 36ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:subtree:branches' for 0ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8:subtree' for 1ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches:8' for 37ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree:branches' for 340ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158:subtree' for 340ms 'mainContent:detailViewer:detailAndSidebarContainer:detailContainer:bodyContainer:subtree:subtree:branches:158' for 359ms Cheers Lasse
