Since much of Google's software is delivered as web-based services running in our datacenters, we often can just look across our production systems to see what kinds of things are consuming lots of cycles (via Google Wide Profiling: https://
static.googleusercontent.com/media/research
.google.com/en//pubs/archive/36575.pdf
…). From that, we can
Google’s Production System Profiling for Performance Optimization
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