Blog archive page loads very slowly

Hi there,

Ran the site through GTMetrix and the result is very good:
http://www.screencast.com/t/dugqNnpKhb

It also loads super fast for me as well.

Have you fixed this?

No Leo. I haven't fixed this yet. And it's giving me headache...

I installed query monitor, which shows that TTFB of the page is 12s, which is way to slow and I cant tell the reason.

At the same time, other pages load normally. This is wierd.

Leon

I just ran it through Pingdom and found this: https://www.screencast.com/t/38lWCg3mQ

Does that script name ring any bells? I think it may be the issue.

Hi Tom,

Thanks for checking.

Im pretty sure the script from Baidu is not the cause. Because the problem happened before i added the script.

The script is just like the google analytics script.

Ill try swiching to default theme and see if it gets fixed.

Thank you.

In that test the Baidu script took 3 seconds to load. The script itself can be very small, but if the server it's hosted on is slow sometimes, it will slow down your page load.

Did you find anything out by switching to the default theme?

Hi Tom,

Baidu is the largest search engine in China and they have cdn enabled worldwide. It may load slower in North America and Europe, but pretty fast in Asia. Of course, your point is well understood. But I'm pretty sure that's not what caused the blog page to load slowly as I added that code a few days ago, but slow loading blog page happened almost a few months ago.

Good news is: by switching to 2017 theme, the blog pages loads just as well as other pages, meaning the problem is solved.

Looks like it has something to do with the theme. I'm using GP Child theme and by switching to GP, the problem remains unsolved.

But I've been using GP for over 2 years and it has performed very well. Right now I couldn't think of anything I did on the website that could lead to this result...

I know when Leo tested on GTMetrix, it loads ok because cache was served by then. But when you are logged in (cache will not serve), it'll take about 10-15s to load the page, and the TTFB alone is 90 percent of the total load time.

The only thing I did about posts on my site is that I installed a plugin that displays related posts on the single post page, but I deleted that plugin after a short time as it slows down the single post page.

I'm using Content Views plugin as well. But I can't see any possible conflict from that either.

Thanks
Leon

Maybe you can turn the caching off so the speed tests can get a realistic load time?

It's very tough to debug without those tests, as there needs to be something specific on the site causing it. If it was GP itself, our own sites would be running slowly as well.

If you can't turn the caching off on your site because of traffic, you'll need to set up a staging server so we can do our tests there.

I totally believe it won't be GP alone that causes this. I use GP on other sites as well and this site is the only one that has this problem.

I believe there could be some plugins or some specific scripts that only load on that page that may conflict with GP and not the default theme.

All caching plugins have been turned off. Autoptimize and WP super cache.

Thank you for your help!
Leon

Have you ruled out a hosting issue? Pingdom says it took 9 seconds of waiting until the resources on your page could even begin downloading. That tells me there's something strange going on with your server.

Who are you hosted with?

Hi Tom,

I'm using Linode VPS running LNMP. It's still too technical for me to rule out issues from the server side. However, there are 4-5 wordpress sites hosted on the server, all with GP theme. This page in particular has this problem. Do you think it's possible that the cause is from the server side?

Thanks
Leon

It could be. Have you ruled out some sort of plugin conflict yet?

Hi Tom,

I disabled the blog module from the GPP and now it works fine. Looks like the default view looks ok. So I'll keep it like this for now.

Thank you for your help.

Leon

That's strange. We have had a couple issues with the image resizer on some servers. That could have been the issue here.

Yes Tom. The image resizer wouldn't work on my site. I set it to 200*200px but it didn't work. It actually worked at the beginning, but I forgot since which update it stopped working.