1388101 - stylo: is really slow

Status: RESOLVED INCOMPLETE

(Core :: CSS Parsing and Computation, defect)

Description

[huzaifaahmed2010]

User Agent: Mozilla/5.0 (Windows NT 10.0; rv:57.0) Gecko/20100101 Firefox/57.0
Build ID: 20170807113452

Steps to reproduce:

Set layout.css.servo.enabled to true.


Actual results:

Page loading became really slow.


Expected results:

Page loading times should have decreased and should have become faster.

Comment 1

[Darkspirit]

(I am just a Nightly user like you.)

Hi, thank you for testing Stylo, too! :-)
Could you please provide some sample links (the more the better) that felt slow when you had Stylo enabled, but fast when disabled?
Maybe you have found something new, maybe this bug would become a duplicate of another one. But without any example I had to close this.
At the moment the most sites should be as fast as Gecko, maybe a bit faster, if I have understood it correctly.
(They are currently optimizing everything. It will become noticeably faster.)

Comment 2

[huzaifaahmed2010]

Hi,
Most sites seem to load slower for me .Sites likes Facebook ,MSN,Yahoo all tend to feel quite slow and laggy.
Very rarely do some blogs and sites feel like the loading times have been improved.
Does enabling stylo on your nightly increase page load times?
I have disabled it for now as it does seem like its quite slower than gecko.Should I enable it ?

(In reply to Darkspirit from comment #1)
> (I am just a Nightly user like you.)
> 
> Hi, thank you for testing Stylo, too! :-)
> Could you please provide some sample links (the more the better) that felt
> slow when you had Stylo enabled, but fast when disabled?
> Maybe you have found something new, maybe this bug would become a duplicate
> of another one. But without any example I had to close this.
> At the moment the most sites should be as fast as Gecko, maybe a bit faster,
> if I have understood it correctly.
> (They are currently optimizing everything. It will become noticeably faster.)

Comment 3

[Darkspirit]

(In reply to huzaifaahmed2010 from comment #2)
> Hi,
> Most sites seem to load slower for me .Sites likes Facebook ,MSN,Yahoo all tend to feel quite slow and laggy.

Hm, do you have a 32 bit or 64 bit system? (I am unsure what your User Agent string wants to tell me in comment 0.)
How many cpu cores do you have? I've heard "the more the better".

> Very rarely do some blogs and sites feel like the loading times have been improved.
> Does enabling stylo on your nightly increase page load times?

Nightly ist overall fast. I don't really feel a difference with and without Stylo. But I'm mostly using Stylo over a month now and am happy that Nightly is often as fast as Chrome, sometimes even faster.

> I have disabled it for now as it does seem like its quite slower than gecko. Should I enable it ?

If you are sure that Stylo is really the cause then try to test it once a week for a day or so. 
There is a bug 1386045 regarding Facebook for example where many patches landed 16 hours ago.
The most helpful would be indeed if you would let Stylo enabled and maybe you find a rare case where a website doesn't look how it should.

Comment 4

[huzaifaahmed2010]

(In reply to Darkspirit from comment #3)
> (In reply to huzaifaahmed2010 from comment #2)
> > Hi,
> > Most sites seem to load slower for me .Sites likes Facebook ,MSN,Yahoo all tend to feel quite slow and laggy.
> 
> Hm, do you have a 32 bit or 64 bit system? (I am unsure what your User Agent
> string wants to tell me in comment 0.)
> How many cpu cores do you have? I've heard "the more the better".
> 
> > Very rarely do some blogs and sites feel like the loading times have been improved.
> > Does enabling stylo on your nightly increase page load times?
> 
> Nightly ist overall fast. I don't really feel a difference with and without
> Stylo. But I'm mostly using Stylo over a month now and am happy that Nightly
> is often as fast as Chrome, sometimes even faster.
> 
> > I have disabled it for now as it does seem like its quite slower than gecko. Should I enable it ?
> 
> If you are sure that Stylo is really the cause then try to test it once a
> week for a day or so. 
> There is a bug 1386045 regarding Facebook for example where many patches
> landed 16 hours ago.
> The most helpful would be indeed if you would let Stylo enabled and maybe
> you find a rare case where a website doesn't look how it should.

I have a 32 bit system running windows 10 .My processor is dual core.
I'll enable stylo and see if everything else works fine and if there are other problems .
Thanks for your advice . :)