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https://issues.apache.org/jira/browse/FLEX-34769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15048565#comment-15048565
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Harbs commented on FLEX-34769:
------------------------------
It seems to boil down to FlowComposerBase.addLiine(). There's some odd code in
there with no comments to explain why it's necessary.
Specifically:
// Making a new line in the middle of an old one. Need to split the old one.
and:
// We're composing ahead, so we need to split the line where we're at
// This can happen if a table is getting composed, some cells can be composed
before
// others that go before.
The first one I understand a little bit. I imagine you have a composed line and
then the contents get pushed to the next line, you need to adjust the previous
one. But I don't understand why it's adding an extra line after the one being
inserted. That's causing problems for me, and I don't understand why it's
necessary.
The second one I do not understand at all. I was assuming that it was for the
uncompleted table code which I totally rewrote to make composition of tables
easier to grasp. However, this code was in Flex 4.6 which I don't think had
support for tables at all.
If anyone has any pointers here, I'd really appreciate it...
> TLF Performance issue (applyLeafFormat method)
> ----------------------------------------------
>
> Key: FLEX-34769
> URL: https://issues.apache.org/jira/browse/FLEX-34769
> Project: Apache Flex
> Issue Type: Bug
> Components: TLF
> Affects Versions: Apache Flex 4.10.0, Apache Flex 4.11.0, Apache Flex
> 4.12.0, Apache Flex 4.13.0, Apache Flex 4.14.0
> Environment: OS: Windows 7
> AIR version: 15 and 16
> CPU: Intel i7 2630h
> RAM: 4GB
> Reporter: goratz
> Assignee: Harbs
> Labels: flex, performance, tlf
> Fix For: Apache Flex 4.9.0
>
> Attachments: TLFPerfTest.as, TLF_Bench.fla, textLayout_14.swc,
> textLayout_9.1.swc
>
>
> I have a very strange performance difference between 2 versions of
> TextLayout.swc. The first one is the swc included in Apache Flex 4.14 SDK and
> the second one is included in Apache Flex 4.9.1.
> I have a very large text, more or less 200 DIN-A4 pages in a Textflow. I
> scroll to the end of the document and I underline a word. This is my result
> underling a word in both versions.
> Flex SDK Version Time
> 4.9.1 21 ms (miliseconds). 0,02 Seconds
> 4.14 3.405 ms (miliseconds). 3,4 Seconds
> The time difference happens in this line of code:
> EditManager.applyLeafFormat(oFormat);
> Anyone has any idea what's the problem?
> More info:
> https://issues.apache.org/jira/browse/FLEX/?selectedTab=com.atlassian.jira.jira-projects-plugin:issues-panel
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