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<p>Hello,
<br>
<br>
I just tested this with our JavaFX application and can confirm
that there are massive differences. It takes around 1-2 seconds to
completely apply all application stylesheets in JavaFX 20 but
takes around 6-7 seconds in JavaFX 21.<br>
</p>
<div class="moz-cite-prefix">On 12/31/2023 3:00 PM, Florian Kirmaier
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CA+4mSqZjxaX586KJaQLnf44F_q-FEivjqgEFinv2mc8nidjo0Q@mail.gmail.com">
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<div dir="ltr">Hi Everyone,<br>
<br>
Sorry for the delay - but I couldn’t find the time to extract
the TestApplication for this bug.<br>
Luckily, I found another application, which is also open source,
which is affected by the application.
<div><br>
I'm speaking about <a href="https://www.jfx-central.com/"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://www.jfx-central.com/</a> -
both the desktop and web versions are affected.<br>
I’ve seen a performance deterioration of 10x when switching
pages when using JavaFX21 compared to JavaFX20.<br>
<br>
I’ve created a ticket with further instructions on how to test
it:<br>
<a href="https://bugs.openjdk.org/browse/JDK-8322795"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://bugs.openjdk.org/browse/JDK-8322795</a><br>
<br>
Greetings<font color="#888888"><br>
<br>
Florian Kirmaier</font></div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, 27 Oct 2023 at 21:31,
Andy Goryachev <<a href="mailto:andy.goryachev@oracle.com"
moz-do-not-send="true" class="moz-txt-link-freetext">andy.goryachev@oracle.com</a>>
wrote:<br>
</div>
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<div class="m_9047044901516997342WordSection1">
<p class="MsoNormal"><span
style="font-size:11pt;font-family:"Iosevka Fixed SS16"">Please
create a ticket, Florian. Would it be possible to
profile the application when scrolling?</span></p>
<p class="MsoNormal"><span
style="font-size:11pt;font-family:"Iosevka Fixed SS16""> </span></p>
<p class="MsoNormal"><span
style="font-size:11pt;font-family:"Iosevka Fixed SS16"">Thank
you</span></p>
<p class="MsoNormal"><span
style="font-size:11pt;font-family:"Iosevka Fixed SS16"">-andy</span></p>
<p class="MsoNormal"><span
style="font-size:11pt;font-family:"Iosevka Fixed SS16""> </span></p>
<p class="MsoNormal"><span
style="font-size:11pt;font-family:"Iosevka Fixed SS16""> </span></p>
<p class="MsoNormal"><span
style="font-size:11pt;font-family:"Iosevka Fixed SS16""> </span></p>
<div
id="m_9047044901516997342mail-editor-reference-message-container">
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<p class="MsoNormal" style="margin-bottom:12pt"><b><span
style="font-size:12pt;color:black">From:
</span></b><span
style="font-size:12pt;color:black">openjfx-dev
<<a
href="mailto:openjfx-dev-retn@openjdk.org"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">openjfx-dev-retn@openjdk.org</a>>
on behalf of Florian Kirmaier <<a
href="mailto:florian.kirmaier@gmail.com"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">florian.kirmaier@gmail.com</a>><br>
<b>Date: </b>Friday, October 27, 2023 at
04:20<br>
<b>To: </b><a
href="mailto:openjfx-dev@openjdk.java.net"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">openjfx-dev@openjdk.java.net</a>
<<a
href="mailto:openjfx-dev@openjdk.java.net"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">openjfx-dev@openjdk.java.net</a>><br>
<b>Subject: </b>Performance Regression in 21
- CSS</span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:11pt">Hi
everyone,<br>
<br>
I've noticed that some parts of one of my
applications is significantly slower with 21.
It's fast with 20.<br>
The application heavily uses (and reuses)
TextFlow with a Cell pattern.<br>
When I scroll, it is smooth with 20, but has
big freezes with 21.<br>
<br>
I've tried all the commits that happened in
between, and pin-pointed it down to the
following:<br>
ticket: <a
href="https://bugs.openjdk.org/browse/JDK-8304959" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">https://bugs.openjdk.org/browse/JDK-8304959</a><br>
PR: <a
href="https://github.com/openjdk/jfx/pull/1070" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">https://github.com/openjdk/jfx/pull/1070</a><br>
commit: <a
href="https://github.com/openjdk/jfx21u/commit/3fa02ee96a6dadbc20cacbf399a2d65df708eee1"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://github.com/openjdk/jfx21u/commit/3fa02ee96a6dadbc20cacbf399a2d65df708eee1</a><br>
<br>
<br>
According to the description and the
discussion in the PR - this wasn't supposed to
change any performance.<br>
Is this regression known?<br>
Otherwise, I should create a ticket for it.<br>
<br>
Greetings Florian</span></p>
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