I'm developing a website and want to test the user experience when some of the images load slowly. Obviously I'm doing everything I can to make assets small and load quickly, but there are slow networks and little hiccups (especially in mobile) that are out of my control.

I know I can delete my cache every time I want to test the page, but not only is this a little bit of a pain, but my connection is fast enough to still load images in a near-instant. The images are being loaded from a CDN.

Can't seem to find anything - has anyone come across something to help me out or have any other ideas of how to slow down my image for testing purposes?

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    Not sure how this relates to UX. – Chairman Meow Aug 6 '14 at 23:14
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    Speed is an essential part of the experience, not limited to, but especially on mobile. It is often referred to as a 'non-functional requirement' and something that development usually is supposed to take care of. Still it's part of the experience and hence related to UX. – greenforest Aug 7 '14 at 8:35
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    believe this should be on stackoverflow.com – Dave Haigh Aug 7 '14 at 12:01
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    I bridge my network connection through a IPCop virtual machine, to allow exactly for this (IPCop allows to limit your bandwidth, making even your LAN slow without tweaking any local parameter). On a side note, this isn't a good fit for Stack Overflow (it would probably be considered offtopic as a question asking to "recommend or find off-site tools") – Alex Aug 8 '14 at 10:27

One simple thing you can do is run Fiddler and go to Rules > Performance > Simulate Modem Speeds.

Another option if your site is public is to use webpagetest.org and change the connection speed under advanced options before you run your test.

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Here is an application that emulates slow connection: it limits the bandwidth to test sites as if they were seen on dial-up or adsl: Sloppy.

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