A presentation on the Velocity 2011 conference from Pieter Ennes from Watchmouse to the London Web Performance Meetup Group. He covers some of this thoughts on the conference and also a brief overview of SPDY.

1. #velocity2011
Bits of Velocity
Pieter Ennes
WatchMouse

2. #velocity2011
➔ Take aways
➔ Sponsoring
➔ Mobile?
 DevOps
➔ Histograms
➔ Asynchronous
➔ SPDY

3. Some take-aways
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4. WatchMouse
 In a tweet:
62
→
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5. World wide
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6. Public Status Pages
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7. Sponsoring
 This year:
 T-shirt sponsor
 Brand awareness
 Blog + IAM
 Next time:
 Booth
 Show-case more advanced features
 Get a talk!
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8. Themes
Themes
 Mobile
 DevOps
 Front-end
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9. Mobile theme?
 KeyNote has invented a hideous mobile monitoring
system (really)
 http://velocityconf.com/velocity2011/public/schedule/detail/20894
 More interesting:
 Sencha
 http://velocityconf.com/velocity2011/public/schedule/detail/19967
 Torbit
 http://velocityconf.com/velocity2011/public/schedule/detail/18135
 Even better:
 Dedicated conference: Mobilism?
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10. Best keynotes
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11. Best keynotes
 Adrian Cockcroft: Netflix in the cloud
 ”Could not build their data center fast enough”
 Amazing transition to Amazon AWS
 Lots of lessons in:
 http://velocityconf.com/velocity2011/public/schedule/detail/17785
 Cloud automatically makes Dev and Ops interleave
 John Rauser: Look at your data
 Essential statistics for everyone
 http://velocityconf.com/velocity2011/public/schedule/detail/20280
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12. Look at your data
 Histograms vs averages: Why important?
 Performance always follows same model
 Gamma distribution(s!)
 Fit to model using your eye
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13. Dev/Web/*Ops
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14. DevOps
 Asynchronous stuff rocks, now even harder
 Pick your framework
 Node.js, Twisted, Cyclone, Tornado, Gevent, …
 Your queues
 SQS, RabbitMQ, Redis, XMPP, ...
 And serialisation
 JSON, BSON, Thrift, ProtoBufs, XML, Avro, …
 Design 'services'
 The above is what the cloud is about
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15. SPDY
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16. SPDY
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17. SPDY
 ”An experimental protocol for a faster web”
 Or: A layer 'between' SSL and HTTP that facilitates:
 Multi-plexing
 Prioritisation
 Compression
 Security
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18. SPDY: Strong points
 HTTP methods remain
 No change in application logic
 Multiplexing
 Mandatory SSL
 But does not perform slower!
 Mandatory Gzip
 Header compression
 Upstream compression
http://www.theregister.co.uk/2011/06/16/google_and_spdy/
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19. SPDY: Weaknesses
 Mandatory SSL
 Every site needs a (valid) certificate
 Risk of devaluation, what's next? EV, E-EV?
Browsers need to communicate this properly
 More work for server (SSL + GZip)
 Caching problems
 Loosen restrictions here?
 No early chunked flushes?
 Content-Length headers mandatory
 Multiplexing is hard: Slow client adaptation?
http://arstechnica.com/web/news/2009/11/spdy-google-
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20. SPDY
http://velocityconf.com/velocity2011/public/schedule/detail/21089
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21. SPDY
http://velocityconf.com/velocity2011/public/schedule/detail/21089
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22. SPDY
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23. SPDY
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24. SPDY: Status
 Google is effectively using it
 Chrome has enabled SPDY on 99% of the
connections; 1% baseline on HTTP
 IANA port nr is for non-SSL SPDY (!?)
 Some benefits, some problems...
http://www.theregister.co.uk/2011/06/16/google_and_spdy/
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25. Questions, drinks, ...
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