Velocity 09: Alistair Croll
summary
Argues that elastic clouds make capacity an on/off knob for user experience and proposes a new metric, cost per visitor second, to tie performance to revenue. Uses a toy model: 100,000 visitors, 10% ideal conversion at $50, and an assumption that sites lose 1% conversions per 100ms slower. Notes no current management tools automatically trade added instances or CDN capacity against incremental revenue in near real time and calls for new operational tooling.
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chapters (4)
- 0:00Start
- 1:39Relationship between traffic and user experience on a web application
- 4:16In a perfect (utility) world
- 4:29The (ridiculously oversimplified) model
