Hi Chris,
In Grid, you seems to create every item in setItemCount
while (count > items.size())
{
new GridItem(this,SWT.NONE);
}
In Table, AFAIK setItemCount only creates an array, something like :
TableItem[] items= new TableItem[count];
setData events are fired for null items on demand, this is the place when
items are created.
Regards,
--
Nicolas
On 6/23/07, Chris Gross <[EMAIL PROTECTED]> wrote:
I'm not sure for all the reasons but Table performance is difficult to
match. For example:
Grid grid = new Grid(shell,SWT.VIRTUAL | SWT.V_SCROLL | SWT.H_SCROLL);
GridColumn column = new GridColumn(grid,SWT.NONE);
column.setWidth(100);
grid.setItemCount(100000);
That code takes about 2100 milliseconds on my system. Run the same thing
with Table and it takes about 20 milliseconds. Thats a huge difference.
Honestly its a little surprising to me that its soo different. I'm sure
there are things I could in Grid for it to be faster but I doubt I can make
up that margin. If you have any insight it would be much appreciated.
Regards,
-Chris
Steve Northover wrote:
Why would the SWT table be faster on Windows? Do you have a benchmark?
*Christopher J Gross <[EMAIL PROTECTED]> <[EMAIL PROTECTED]>*
Sent by: [EMAIL PROTECTED]
06/22/2007 04:57 PM Please respond to
Nebula Dev <[email protected]> <[email protected]>
To
Nebula Dev <[email protected]> <[email protected]> cc
Subject
Re: [nebula-dev] Grid - Support multiple lines in a GridItem and
SWT.VIRTUAL ?
Hi Ivan,
I've just implemented on small performance fix that should speed up
performance on population. That being said, the base SWT Table is likely
always going to be faster than Grid (at least on win32 Windows port).
-Chris
From: "Ivan Ooi" <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> To: "Nebula
Dev" <[email protected]> <[email protected]> Date: 06/22/2007
12:58 PM Subject: Re: [nebula-dev] Grid - Support multiple lines in a
GridItem and SWT.VIRTUAL ?
------------------------------
oh! sorry, is my fault. yape! VIRTUAL was implemented. I use the Table
VIRTUAL sample and it works :-) but... like what you had mentioned,
performance not as snappy as Table control...
On 6/7/07, *Chris Gross* <[EMAIL PROTECTED] <[EMAIL PROTECTED]>> wrote:
Hi Ivan,
Grid currently supports multiple lines in an item by using a combination
of GridColumn#setWordWrap and Grid#setItemHeight. There is also some work
underway to allow differing heights for different items. See:*
**https://bugs.eclipse.org/bugs/show_bug.cgi?id=190252*<https://bugs.eclipse.org/bugs/show_bug.cgi?id=190252>
SWT.VIRTUAL has been implemented though there is one outstanding issue
preventing performance from being particularly good. Regardless, 10,000 is
not a large number of rows for the tab and that should populate extremely
quickly with or without SWT.VIRTUAL.
Regards,
-Chris
Ivan Ooi wrote:
Hi,
Does Grid control able to support multiple lines in a GridItem as what
Table control able ?
What about SWT.VIRTUAL ? This features is good for 10k rows.
Thanks
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Nicolas Richeton
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