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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?

closed as off-topic by Benny Skogberg, Matt Obee, Evil Closet Monkey, Toni Leigh, Graham Herrli Aug 14 '14 at 21:00

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions about Implementation are off-topic because this site is for User Experience design questions, not questions around how to implement these designs. Therefore, questions around the use of programs like Photoshop or languages such as CSS or JavaScript are off topic." – Benny Skogberg, Matt Obee, Evil Closet Monkey, Toni Leigh, Graham Herrli
If this question can be reworded to fit the rules in the help center, please edit the question.

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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
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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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