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By Andrey_Karpov_2009
via pvk.ca
Submitted: Feb 19 2014 / 08:09

I joined the ad server team at AppNexus two weeks ago. It’s a new problem domain for me, one that I find pretty interesting so far: the workload is definitely on the branchy/pointer-chasing side of things, and, although aggregate throughput matters, we work under stringent latency goals. There are a few hash table lookups on the code path I’ve been working on, and some micro-benchmarking revealed that 1GB pages could easily shave 25% off the latency for lookups in large (hundreds of MB) tables.
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