[kmail2] [Bug 334469] New: Long emails with lots of quoted text makes the UI unresponsive

[Francois Prunier]

https://bugs.kde.org/show_bug.cgi?id=334469

            Bug ID: 334469
           Summary: Long emails with lots of quoted text makes the UI
                    unresponsive
    Classification: Unclassified
           Product: kmail2
           Version: 4.13
          Platform: Kubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: grave
          Priority: NOR
         Component: composer
          Assignee: kdepim-bugs at kde.org
          Reporter: francoisprunier at hotmail.com

When replying to a long email with lots of messages back and forth between me
and the recepient, the emails is long and the composer window freezes for a
long time before I can actually edit anything, the CPU is 100% on one core. You
need to painfully remove some of the replied to text to make it shorter and
then it becomes usable again.

This makes kmail unusable for me at work.

Reproducible: Always

Steps to Reproduce:
1. Pick a long email to reply to
2. Hit reply
3. Wait a few minutes before you can actually edit 
Actual Results:  
You need to aait a few minutes before you can actually edit. The only trick
that make it usable again is to chop off the end of the email to make it
shorter. Then it becomes responsive again.

Expected Results:  
The wait before editing a reply to a long email should be a few seconds.

That happens on the latest ubuntu and the one before that as well. I'm pretty
sure it was happening on kmail 4.12 and 4.11.

I use kmail inside kontact. But I have the same issue with kmail alone.

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