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delays lasting several seconds when new unread emails are clicked on
 
#1
3376.1683  
The programme responds with delays lasting several seconds when new unread emails are clicked on. This is particularly noticeable when a large number of new emails (e.g. 100 after an absence) have arrived.

If the two highlighted options are disabled, the delay disappears.
However, monitoring is not enabled!

https://mega.nz/file/CJoBXY6B#QCAxnQDhOSsKlfsFFKl2QjVA4a0zVFecqAnbwjVkF1o

Windows 11
The Bat 12.1
POP3
 
 
 
#2
0  
This is useful information, thanks for letting us know. Please also notify support using the link above, as this is something that should perform instantly on today's computers.

I found that manually clearing the CEF browser cache helps a lot with such slowdowns: https://www.ritlabs.com/en/auth-forums/forum4/topic16681/

Relatively recently I gave up on CEF altogether and use TB with the /ForceNoCEF command-line option. Rendering of HTML messages is a bit uglier and clunkier, but the speed and responsiveness have gone WAY up.
 
 
 
#3
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Quote
Miloš Radovanović wrote:
This is useful information, thanks for letting us know. Please also notify support using the link above, as this is something that should perform instantly on today's computers.
Done

Quote
Miloš Radovanović wrote:
I found that manually clearing the CEF browser cache helps a lot with such slowdowns:  https://www.ritlabs.com/en/auth-forums/forum4/topic16681/
I know because I was partly in the discussion. But that was to inconvenient.

Quote
Miloš Radovanović wrote:
Relatively recently I gave up on CEF altogether and use TB with the /ForceNoCEF command-line option.
Great, Thanks.

BTW: I didn't get email notifications allthough I'm subscribed.
 
 
 
#4
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Quote
Markus wrote:
Quote Miloš Radovanović  wrote:I found that manually clearing the CEF browser cache helps a lot with such slowdowns:   https://www.ritlabs.com/en/auth-forums/forum4/topic16681/

I know because I was partly in the discussion. But that was to inconvenient.

Oh yes, you were the one with 1.4GB of accumulated cache :D

Quote
Markus wrote:
Quote Miloš Radovanović  wrote:Relatively recently I gave up on CEF altogether and use TB with the /ForceNoCEF command-line option.

Great, Thanks.

Forgot to mention, the alternative viewer has the mouse scrollwheel and clunky sidebar issues: https://www.ritlabs.com/en/auth-forums/forum4/topic16697/

But I mostly use the trackpad.

Quote
Markus wrote:
BTW: I didn't get email notifications allthough I'm subscribed.

I never get them.

Anyway, since you posted this I reintroduced CEF into TB, and first impressions are that history is another major part in solving the slowdown issues. Waiting to see whether TB will leave orphan CEF processes in the background after closing, now that I disabled history monitoring altogether. These can cause major slowdowns if not killed manually before starting TB again.
 
 
 
#5
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Quote
Miloš Radovanović wrote:
Anyway, since you posted this I reintroduced CEF into TB, and first impressions are that history is another major part in solving the slowdown issues. Waiting to see whether TB will leave orphan CEF processes in the background after closing, now that I disabled history monitoring altogether. These can cause major slowdowns if not killed manually before starting TB again.

It's been almost a month now of using TB with history tracking turned off and CEF turned back on, and I can confidently say that history was a major cause for slowdowns when viewing messages, even more than the CEF cache. I was about to report that, after disabling it, I had no instances of orphan CEF processes, but it happened yesterday... and only once. Before it was a daily occurrence.

It's kind of strange since I had the history set up to only track outgoing messages, but it seems that all folders were being scanned anyway.

Apparently, the history tracker would delay the viewing of messages so much that CEF processes would crash. Yes, CEF is a bit slower than the alternative HTML message viewer, but now we're talking in milliseconds, not seconds or minutes.

Edited: Miloš Radovanović - 24 May 2026 19:17:29
 
 
 
#6
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I'm also feeling this delay for a few weeks now. It seems to me that only HTML emails are affected, for example, emails from eBay. Very annoying and  only happening lately. Anyway, I can't find any $cef$ folder. Using version 10.5.4
 
 
 
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