Slow TTFB

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dattard
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Slow TTFB

Post by dattard » Fri Oct 11, 2019 1:24 pm

Hey guys,

I run a Joomla website which has been tuned as much as I can for speed with the following:

1. As few as possible extensions, modules, and plugins enabled. It's not that I don't have, but I disable anything which is not being used.
2. MySQL running on MariaDB 10.3
3. Joomla caching enabled + JotCache for page caching
4. JCH Optimize set up
5. PHP 7.2 enabled with OpCaching
6. InMotion hosting VPS server

Yet, despite as many as optimizations I can set up, there is still a fairly long TTFB. I can see that the afterRender seems to be running at around 1 second, which is probably where the biggest hit is coming from.

Would there be anybody who can debug where the potential bottleneck is?

Or if not, maybe guidance on how to identify the actual bottleneck, module, plugin or whatever might be causing the problem.

I've enabled the Debug too, but the biggest impact seems to be coming from "afterRender" ... which leaves me a bit frustrated in the sense that I'm not sure where the problem is coming from.

Thanks in advance.
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SharkyKZ
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Re: Slow TTFB

Post by SharkyKZ » Fri Oct 11, 2019 1:45 pm

Have you tried disabling JCH Optimize?

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dattard
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Re: Slow TTFB

Post by dattard » Fri Oct 11, 2019 2:09 pm

Wow - I'm doing exactly that right now, and it seems it's one of the biggest performance culprits.

That's extremely counter intuitive, everywhere you read about performance tuning, you'll find people recommending it wholeheartedly.
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Re: Slow TTFB

Post by helpwithjoomla » Sat Oct 12, 2019 12:08 am

Have you tried experimenting with the JCH settings? There are tons of settings and adjusting them may let you take advantage of all JCH does without the slow TTFB.
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dattard
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Re: Slow TTFB

Post by dattard » Sun Oct 13, 2019 3:39 pm

I've been trying to tweak the settings, but it seems I get a very serious hit as soon as it is enabled.
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Re: Slow TTFB

Post by helpwithjoomla » Sun Oct 13, 2019 4:48 pm

Hmmm...that is unusual. I haven't had the same experience with JCH.

Probably time to ask JCH for feedback.
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