Creating Widets performance problems

[Paul.Withers]

Hi,

I'm trying to create thousands of WidgetLabels using WidgetLabel::create() and it's taking a very long time (15-20 seconds on my high end pc). Is there a faster way to create them instead of one function call per new object?

Cheers!

[morbid]

Hello Paul,

We checked the speed with our stress sample (<sdk>\data\samples\stress) and all widget were created really fast. 10 000 were created in less than 1 second on intel core i5 6600.

Could you please send us a code sample where we can analyze the issue?

Thank you.

[Paul.Withers]

Thanks for the fast reply!

It's just a simple loop that creates WidgetLabels, but it's creating over 300, 000 :)

How does it compare to Unigine::ObjectGui::create()? I can call that function the same number of times and the creation time is nearly instant.

[silent]

Hi Paul,

For 300k widgets, I'm afraid there is nothing we can do :) Btw, why do you need 300k independent labels? It probably will give you 1fps in real project.

And the difference between adding 300k Widgets and 300k empty ObjectGUI is that ObjectGUI performs simple for loop and checks inside:

<...>
for (int i = 0; i < children.size(); i++)
{
	if (children[i] == widget)
<..>

For 300k widgets we perform ((1 + 300000) / 2) * 300000 = 45000150000 comparisons (45 billions).

I would say that thousands / tens of thousands widgets is the upper limit for adequate performance.

Thanks!

[silent]

In theory splitting your 300k WidgetLables between multiple WidgetVBox/WidgetHBox (let's say 1000) should improve the creation speed.

[Paul.Withers]

My mistake, i didn't mean WidgetLabel, the bottleneck is Unigine::ObjectGui::create(), which is showing up in my profiler as being about 1.5 milliseconds per call.

Can i confirm this performance, and is there a more optimal way of creating ObjectGui's?

[silent]

Hi Paul,

I'm afraid there is nothing else what we can suggest to improve this, sorry.