
Node.js
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In the fall of last year, Joyent hosted the first node.js programming contest, Node Knockout. The team-based, all-weekend programming contest—in which each team was given a virtual machine optimized for node.js—afforded an early opportunity to experiment with novel mechanisms of system instrumentation and visualization in a dynamic, server-side JavaScript environment. To explore these opportunties, we developed a public leaderboard for the contest, consisting of DTrace-based instrumentation for node.js in a virtualized, multi-tenancy environment; a node.js-based architecture to aggregate data across machines and present it in real-time; and mechanisms for visualizing data in a scalable and repsonsive fashion.

