[Interest] Extremely sluggish browser performance in Qt 5.5

Sun Jun 21 05:09:02 CEST 2015

Just as an example, a local site here in Australia smh.com.au takes about 1 second to load the entire page (ads and all) on the latest version of Chrome.

Using the WebEngine Tab Browser example in Qt 5.5.0 built for release takes at least 7 minutes to load the entire page and up to 10 minutes before it becomes responsive to mouse clicks.

Given that I thought WebEngine was based on the latest Chromium as in Chrome itself, it seems quite bizarre that there should be such a staggeringly large difference in load times.

And as I said, Google Maps is completely unusable taking minutes to load the initial map and then taking minutes to fully respond to zoom events.

What the hell is going on here?

From: interest-bounces+ozemale=ozemail.com.au at qt-project.org [mailto:interest-bounces+ozemale=ozemail.com.au at qt-project.org] On Behalf Of John C. Turnbull
Sent: Saturday, June 20, 2015 1:07 PM
To: 'Shantanu Tushar'
Cc: 'Interests Qt'
Subject: Re: [Interest] Extremely sluggish browser performance in Qt 5.5

Thanks, I downloaded and tried it out and there is absolutely nothing abnormal appearing to happen in any of those areas.

It really looks like the same symptoms you would see if you were running a dial-up connection but I actually have a 120Mbps cable connection and, as I said, it affects every page and all those pages load instantly in every other browser.

Any other ideas?  Being able to use Google Maps in our app is absolutely crucial but at the moment it is completely unusable.

From: Shantanu Tushar [mailto:shaan7in at gmail.com] 
Sent: Friday, June 19, 2015 3:01 PM
To: John C. Turnbull
Cc: Yuvraaj Kelkar; Interests Qt
Subject: Re: [Interest] Extremely sluggish browser performance in Qt 5.5

This, though a very simple tool has been very handy for me to  analyze performance issues http://technet.microsoft.com/en-in/sysinternals/bb896653.aspx . Double click on your process to see detailed views of thread performance, GPU usages, context switches and so on. See if you can spot some irregularities.

On Fri, Jun 19, 2015 at 10:18 AM, John C. Turnbull <ozemale at ozemail.com.au <mailto:ozemale at ozemail.com.au> > wrote:

Well, as I said, I am using the example apps that come with Qt 5.5.0 in Qt Creator Examples – either the WebEngine Quick Nano Browser example or the WebEngine Tab Browser example will exhibit the problem.

They come with the Mac and Linux Qt distros as well don’t they?

From: Yuvraaj Kelkar [mailto:yuvraaj at gmail.com <mailto:yuvraaj at gmail.com> ] 
Sent: Friday, June 19, 2015 12:39 PM
To: John C. Turnbull
Cc: rpzrpzrpz at gmail.com <mailto:rpzrpzrpz at gmail.com> ; Interests Qt

Subject: Re: [Interest] Extremely sluggish browser performance in Qt 5.5

If you have a sample application, I can compile for Mac windows and Linux and try it out.

On Jun 18, 2015 7:08 PM, "John C. Turnbull" <ozemale at ozemail.com.au <mailto:ozemale at ozemail.com.au> > wrote:

Unfortunately I only have access to a Windows machine :-(

-----Original Message-----
From: interest-bounces+ozemale=ozemail.com.au at qt-project.org <mailto:ozemail.com.au at qt-project.org> 
[mailto:interest-bounces+ozemale <mailto:interest-bounces%2Bozemale> =ozemail.com.au at qt-project.org <mailto:ozemail.com.au at qt-project.org> ] On Behalf Of
rpzrpzrpz at gmail.com <mailto:rpzrpzrpz at gmail.com> 
Sent: Friday, June 19, 2015 11:41 AM
To: interest at qt-project.org <mailto:interest at qt-project.org> 
Subject: Re: [Interest] Extremely sluggish browser performance in Qt 5.5

On 6/18/2015 5:38 PM, John C. Turnbull wrote:
> All I am doing is running the WebEngine Tab Browser example from
> Creator
> 3.4.0 which comes with the version of Qt that I downloaded which is
> 5.5.0 MSVC2013 64-bit.  I have selected to build for RELEASE and then
> I just run it.
>
> The machine is a powerful Dell Precision 7500 Workstation with 2 x
> Xeons and 64G of RAM and a Quadro FX 5800 GPU.
>
> The browser performance is absolutely woeful to the point of being
unusable.
>
> *From:*Mark Langezaal [mailto:mark.langezaal at xs4all.nl <mailto:mark.langezaal at xs4all.nl> ]
> *Sent:* Thursday, June 18, 2015 9:11 PM
> *To:* John C. Turnbull; interest at qt-project.org <mailto:interest at qt-project.org> 
> *Subject:* Re: [Interest] Extremely sluggish browser performance in Qt
> 5.5
>
> Perhaps you have linked to a non optimized Qt package? (-O0 in stead
> of -O2)
>
> Not sure how this could happen.
>
> Did you compile it yourself?
>
> Mark
>
> -------- Oorspronkelijk bericht --------
>
> Van: "John C. Turnbull"
>
> Datum:18-06-2015 07 <tel:18-06-2015%2007> :25 (GMT+01:00)
>
> Aan: interest at qt-project.org <mailto:interest at qt-project.org>  <mailto:interest at qt-project.org <mailto:interest at qt-project.org> >
>
> Onderwerp: Re: [Interest] Extremely sluggish browser performance in Qt
> 5.5
>
> Anyone???
>
> *From:*John C. Turnbull [mailto:ozemale at ozemail.com.au <mailto:ozemale at ozemail.com.au> ]
> *Sent:* Monday, June 15, 2015 7:31 AM
> *To:* 'interest at qt-project.org <mailto:interest at qt-project.org> '
> *Subject:* RE: [Interest] Extremely sluggish browser performance in Qt
> 5.5
> *Importance:* High
>
> Hasn't anyone else tried out the WebEngineView in Qt 5.5 QML?  I just
> can't explain why it takes minutes to load pages that load
> instantaneously in Chrome or Firefox.  This is really hurting us,
> especially the unusable Google Maps.
>
> *From:*interest-bounces+ozemale=ozemail.com.au at qt-project.org <mailto:ozemail.com.au at qt-project.org> 
> <mailto:interest-bounces+ozemale <mailto:interest-bounces%2Bozemale> =ozemail.com.au at qt-project.org <mailto:ozemail.com.au at qt-project.org> >[mailto
> :interest-bounces+ozemale=ozemail.com.au at qt-project.org <mailto:ozemail.com.au at qt-project.org> ]
> *On Behalf Of *John C. Turnbull
> *Sent:* Friday, June 12, 2015 5:41 AM
> *To:* interest at qt-project.org <mailto:interest at qt-project.org>  <mailto:interest at qt-project.org <mailto:interest at qt-project.org> >
> *Subject:* [Interest] Extremely sluggish browser performance in Qt 5.5
>
> I am just trying out the "nano browser" in Qt 5.5 on Windows 7 64-bit
> and find it almost unusable.
>
> Loading **any** website is slow but it is particularly noticeable with
> Google Maps.  It can take more than a minute to render the initial map
> and then zooming in first shows just a scaled and pixelated version of
> the map and then it can several minutes for the details to be rendered
> properly.  Also, switching from map to Earth/Satellite view seems to
> take forever too.
>
> What could be causing this incredible slowness?  It's not the network
> itself as the same sites load instantaneously in other browsers like
> Chrome and Firefox on the same machine and there is no proxy involved.
>
> Given that the primary use case I had intended for the Qt browser
> implementation is Google Maps, this is all very worrying!
>
> Thanks,
>
> -jct
>
>
>
> _______________________________________________
> Interest mailing list
> Interest at qt-project.org <mailto:Interest at qt-project.org> 
> http://lists.qt-project.org/mailman/listinfo/interest
>

Can you run the same test on OSX and or Android?

Just provide a chance to see if 5.5 web is sluggish across more than
platform.

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-- 

Shantanu Tushar    (UTC +0530)
shantanu.io <http://shantanu.io> 

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