Amazon EC2 network latency test

Last March, I've tried to upload BITNA service(sort of web service for smartphone app) on world-wide Amazon EC2 servers. In that process, for checking latency, I wrote a memo regards ping latency and HTTP latency(specific page that returns kind of 'hello world'). Certainly, it's not pretty precise time and based on Korea's network environment, but I believe that you might need this data for your reference.

GAE(HTTP) is HTTP request/response latency, and others are ping request/response latency. (unit is ms) Surely, GAE means Google App Engine. This result shows HTTP latency is pretty much, as compared to ping latency.

to from	GAE	GAE(HTTP)	Site A*	Site B**
EC2(Oregon)	20~30	118~	228~	179~
EC2(Singapore)	9~15	261~	116~	122~
EC2(Tokyo)	32~34	254~	48~	52~
EC2(Ireland)	21	117~	380~	313~
EC2(Virginia)	2~4	16~	200~	240~
*** KT wibro	130~190	320~	88~	95~
*** KT 3G	300~	380~
Cable Internet****	45~52	280~

* web-hosting type site in Korea

** virtual host type site in Korea

*** KT wibro and KT 3G are mobile internet service of Korean company KT.

**** Cable network ISP in Seoul, Korea