Hi
I've the code of an old version of the infragistics suite (v2007.3) and I've found a very weird performance problem that arises when using IE8.
I'm reporting it because it is occurring also in your demo site that is using the version 2009.1, but I don't know if this problem has been solved in the hotfix you have released for the 2009.1.
The problem is in this javascript procedure: file 'ig_webgrid_dom.js', function "init" contained in object igtbl_ptsRow. The actual problem is this line of code
tr.cells[j].id = cellId.join(
"_");
That line of code (the setting of the id of a cell) is very very very slow under IE8, but has no impact with IE7.
Can you tell me whether this issue has been solved in v2009.1 hotfix?
Is the source code of the hotfix available upon buying v2009.1?
Best regards, Andrea Pirola
Hello,
No, this problem is not resolved in the latest hot fix. Honestly I am not sure how we'd be able to without changing logic and therefore potentially introducing more problems.
In general IE8 behaves horribly when it comes to manipulating tables. Hopefully MS will take care of it in the first service pack for IE8. I'd suggest you to bring it to their attention as well by going to connect.microsoft.com
The source code is available to all customers with subscription.
first of all, permit me to give you a possible solution for IE8. The slowness of IE8 setting the IDs of the cells is much more evident when the html table has defined the <col> tags. I've provided two example files.
"TestTableWithCol.html" is a 1K cell table with <col> tags.
"TestTableWithoutCol.html" is a 1K cell table without <col> tags
A JS function iterates over all the cells and set the IDs of each of them. The difference in performance is terrible (without cols is 6 times faster more or less). So, is it possible, in the newer versions of the grid to render it without those tags? The widths of the columns could be moved to the table header, couldn't they?
I'm sorry for stressing the point, but the problem is also worse in the 2009v1 that I've tested as a trial than in 2007v3 I've bought, because the in 2007v3 the set of the ids is invoked only when a row is actually clicked, instead in 2009v1 the set of the IDs is performed for all the rows on the load of the page (I don't remember which function calls it). This makes the rendering of the grid really slower in the new version than in the older one (I've a grid with 200 hundred rows that takes 12 seconds to display).