Synchronous XMLHttpRequest causing site slow downs; intermittent behavior.
By Austin Ramsdale on Wednesday, 06 May 2015
Posted in Technical Issues
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Since support seems to be on a roll lately, I've got a good one that I've been trying to track down!

Every few http requests to my site sees about a 10 second delay in the page fully rendering. When I inspect the page and look at the console, whenever the delay occurs, I see the following error:

"Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check http://xhr.spec.whatwg.org/."

And it stops attempting to load 16 POSTS using the SEND command in this ES JS file. Any ideas as to what it's trying to do? It is always this itemid #126...

POST https://redacted/index.php?option=com_easysocial&lang=&Itemid=126&_ts=1430918301285 net::ERR_EMPTY_RESPONSE
send @ easysocial-1.3.27.static.min.js:149
v.send @ easysocial-1.3.27.static.min.js:143
(anonymous function) @ easysocial-1.3.27.static.min.js:284
(anonymous function) @ easysocial-1.3.27.static.min.js:268
easysocial-1.3.27.static.min.js:149
Hi Austin Ramsdale,

Sorry for late reply to this,

Can you provide us with your Joomla backend and FTP access so we can better have a look of this?

Also, may i know which page are you hitting this error on console.
Arlex Wong
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Thursday, 07 May 2015 15:00
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Site details have been added to the dashboard so that you can access.

The page I am hitting this error on is baseurl/index.php :-/

Thank you!
Austin Ramsdale
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Thursday, 07 May 2015 22:01
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Actually, looks like it's trying to hit /easysocial/site/friends/suggest.hint.search 404 (Sorry, but this page isn't available.) and /easysocial/site/hashtags/suggest.hint.empty 404 (Sorry, but this page isn't available.)

Again, it doesn't hit this snag all of the time, only intermittently. Hopefully you'll see the same thing after you log in.
Austin Ramsdale
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Thursday, 07 May 2015 22:51
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Hello Austin,

I am sorry for the delay of this reply.

I've checked your site and it seems like everything is working fine from my end. I'm not seeing any error in my console when browsing through your site. Am I missing something here? Please advise.
Ezrul Fazwan
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Friday, 08 May 2015 17:57
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What browser are you using?

I'm able to get it pretty regularly with Chrome after logging in to the front-end. Everywhere else is snappy (Back-end, pre-login, etc), but after you login it uses the SEND command that times out.
Austin Ramsdale
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Saturday, 09 May 2015 21:49
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FYI - I just browsed extensively with Safari, and noticed no slowdown, but with multiple computers on Chrome, that error occurs.

Unsure about other browsers.
Austin Ramsdale
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Saturday, 09 May 2015 21:59
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Hello Austin,

I am sorry for the delay of this reply.

I'm using firefox and chrome to inspect your site and I'm not seeing any error message from my end. I also noticed that your site is not experiencing slowdown for both browser. I am not quite sure how to reproduce the issue on my end here
Ezrul Fazwan
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Monday, 11 May 2015 19:21
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