I was surprised as well, I wasn't that impressed with web sockets for a while
then realised it was the server side holding them back.

They are also interesting because you can play with asymmetry. For example:
ping with 1 byte up but 1k down? or vice versa. Can. You can't do that with icmp.

they also don't seem to be too demanding on cpu.

On Fri, May 8, 2015 at 11:20 PM, Rich Brown <richb.hanover@gmail.com> wrote:

On May 7, 2015, at 6:44 AM, jb <justin@dslr.net> wrote:

There is a web socket based jitter tester now. It is very early stage but works ok.


I was surprised to see how *good* a test the websocket could be. It appears to add only a couple msec over the ICMP Echo timings.

Here are a few samples from the web page. The first four columns show the values from the PDV test; the final column is the min/avg/max/stddev from ping.

NY, USA 162.248.95.144 41 +3ms 38.677/40.405/43.192/1.269 ms

CO, USA 72.5.102.138 80 +3ms 79.305/81.531/85.514/1.540 ms

LA, USA 162.248.93.162 108 +5ms 105.225/106.540/108.358/0.877 ms

Nice work, Justin!

Rich