5 ms·

If you work on anything web related and you have a Mac or an iOS device, I strongly encourage you to try the "Network Link Conditioner". It's a preference pane

If you work on anything web related and you have a Mac or an iOS device, I strongly encourage you to try the "Network Link Conditioner". It's a preference pane (on OS X) or a setting (on iOS) that allows you to simulate different types of networks. You can artificially limit bandwidth and transmission delay, simulate package loss and DNS delay. For me, it's become an essential tool for testing website & app performance.

skrebbel 12y ago
Nice! Does anyone know whether something like this exists on Windows?
- goldins 12y ago
  Google Chrome Canary has network throttling functionality.
  - tuacker 12y ago
    As does plain Google Chrome, at least on OSX. Open Dev Tools and click the 2nd icon on top, next to the loupe, which looks like a mobile phone. From there you can specify a set of throttling speeds (offline, gprs, edge, 3G, DSL, Wifi)
- lstamour 12y ago
  Fiddler or Network Emulator for Windows Toolkit perhaps. I'm sure there are other options though.
- wasyl 12y ago
  There is crapify [1]. I remember seeing other tools as well, but can't find them at the moment. [1] https://www.npmjs.com/package/crapify https://www.npmjs.com/package/crapify
- scott_karana 12y ago
  I like "clumsy", which has a perfect animated GIF showing the app: http://jagt.github.io/clumsy/index.html http://jagt.github.io/clumsy/index.html
  - marasal 12y ago
    This is great. Thanks.
- junto 12y ago
  Since nearly every Windows web dev has Fiddler2, it can simulate network latency: http://helephant.com/2012/07/11/simulating-network-latency-with-fiddler/ http://helephant.com/2012/07/11/simulating-network-latency-w...
- WickyNilliams 12y ago
  I believe Fiddler handles this? Not very friendly to change, but it's documented here http://docs.telerik.com/fiddler/KnowledgeBase/FiddlerScript/PerfTesting http://docs.telerik.com/fiddler/KnowledgeBase/FiddlerScript/...
LukeB_UK 12y ago
Chrome has a network throttling emulation in the dev tools too: https://developer.chrome.com/devtools/docs/device-mode https://developer.chrome.com/devtools/docs/device-mode
- taude 12y ago
  One thing I wish I was able to do in the Chrome tools is to set my bandwith and latency preferences manually...
  - IgorPartola 12y ago
    Yes! There is a huge jump between DSL and Wi-Fi. Adding the ability to randomly drop out the network would be nice too.
  - teraflop 12y ago
    Somebody opened an issue on the Chromium bug tracker asking for the ability to customize those parameters. The Chromium devs added another preset and marked it as "fixed" even though it clearly isn't. https://code.google.com/p/chromium/issues/detail?id=441858 https://code.google.com/p/chromium/issues/detail?id=441858
- Kiro 12y ago
  It doesn't affect things like Web Sockets though.
krebby 12y ago
There's also Comcast[0]. No clue if it's any good but the name is amazing. [0] https://github.com/tylertreat/Comcast https://github.com/tylertreat/Comcast
- stingraycharles 12y ago
  Seems like a copy of the joke the people of The Onion came up with a few months earlier, ComcastifyJS: https://theonion.github.io/comcastifyjs/ https://theonion.github.io/comcastifyjs/
click170 12y ago
If you're on a Linux system, the 'tc' (traffic control) command has many similar abilities, though the UI is CLI only and is a bit cryptic. There are many posts and articles on usage though, including the Linux Advanced Routing and Traffic Control manual.

skrebbel 12y ago

Nice! Does anyone know whether something like this exists on Windows?

goldins 12y ago
Google Chrome Canary has network throttling functionality.
- tuacker 12y ago
  As does plain Google Chrome, at least on OSX. Open Dev Tools and click the 2nd icon on top, next to the loupe, which looks like a mobile phone. From there you can specify a set of throttling speeds (offline, gprs, edge, 3G, DSL, Wifi)
lstamour 12y ago
Fiddler or Network Emulator for Windows Toolkit perhaps. I'm sure there are other options though.
wasyl 12y ago
There is crapify [1]. I remember seeing other tools as well, but can't find them at the moment. [1] https://www.npmjs.com/package/crapify https://www.npmjs.com/package/crapify
scott_karana 12y ago
I like "clumsy", which has a perfect animated GIF showing the app: http://jagt.github.io/clumsy/index.html http://jagt.github.io/clumsy/index.html
- marasal 12y ago
  This is great. Thanks.
junto 12y ago
Since nearly every Windows web dev has Fiddler2, it can simulate network latency: http://helephant.com/2012/07/11/simulating-network-latency-with-fiddler/ http://helephant.com/2012/07/11/simulating-network-latency-w...
WickyNilliams 12y ago
I believe Fiddler handles this? Not very friendly to change, but it's documented here http://docs.telerik.com/fiddler/KnowledgeBase/FiddlerScript/PerfTesting http://docs.telerik.com/fiddler/KnowledgeBase/FiddlerScript/...

LukeB_UK 12y ago

Chrome has a network throttling emulation in the dev tools too: https://developer.chrome.com/devtools/docs/device-mode https://developer.chrome.com/devtools/docs/device-mode

taude 12y ago
One thing I wish I was able to do in the Chrome tools is to set my bandwith and latency preferences manually...
- IgorPartola 12y ago
  Yes! There is a huge jump between DSL and Wi-Fi. Adding the ability to randomly drop out the network would be nice too.
- teraflop 12y ago
  Somebody opened an issue on the Chromium bug tracker asking for the ability to customize those parameters. The Chromium devs added another preset and marked it as "fixed" even though it clearly isn't. https://code.google.com/p/chromium/issues/detail?id=441858 https://code.google.com/p/chromium/issues/detail?id=441858
Kiro 12y ago
It doesn't affect things like Web Sockets though.

krebby 12y ago

There's also Comcast[0]. No clue if it's any good but the name is amazing. [0] https://github.com/tylertreat/Comcast https://github.com/tylertreat/Comcast

stingraycharles 12y ago
Seems like a copy of the joke the people of The Onion came up with a few months earlier, ComcastifyJS: https://theonion.github.io/comcastifyjs/ https://theonion.github.io/comcastifyjs/

click170 12y ago

If you're on a Linux system, the 'tc' (traffic control) command has many similar abilities, though the UI is CLI only and is a bit cryptic. There are many posts and articles on usage though, including the Linux Advanced Routing and Traffic Control manual.