Previous week I've deployed a new version of DnsValidation.com which brings a new asynchronous architecture based on EventMachine which makes DNS reports really fast (on average ~7 seconds/report). Now most of delay is produced by mail servers  and its RBL checks, I still need to make some fine tunings.

While working on this release I've learned a few things:

• Event-driven programming is hard, it's very easy to lock the entire process while waiting for event/condition that will never happen :)
• Extending Ruby is fun
• Starbucks may not have the best coffee, but it's a great way to escape from daily routine (warm ambiance, free WiFi and AC Power included)

Changes:

• Asynchronous architecture - checks are executed in parallel which leads to faster reports
• IDN (Internationalized Domain Names) support:
  
  • Example reports:
    • Gartenmöbel.de - ”garden furniture” in German
    • 网站目录.com - Chinese
    • 스타벅스코리아.com - Starbucks Korea
    • аромат.com - Russian Shop
• TLD DNS reports:
  
  • Example TLD reports
    
    • .com
    • .travel
    • .fr
    • .ly
    • .cz
    • .ru
• DomainKeys checks removed as everyone is migrating to it's successor DKIM (no DKIM checks right now).

References:
http://www.idnguru.com/idn-language-list/