quantile: Use an if instead of math.Min This significantly speeds up targeted streams when epsilon is small because the invariant is called a lot. benchmark old ns/op new ns/op delta BenchmarkInsertTargetedSmallEpsilon 611 442 -27.66% BenchmarkInsertTargeted 188 171 -9.04% BenchmarkInsertBiasedSmallEpsilon 833 914 +9.72% BenchmarkQuery 105 97.5 -7.14% BenchmarkInsertBiased 176 172 -2.27% BenchmarkQuerySmallEpsilon 6599 6500 -1.50%
Perks contains the Go package quantile that computes approximate quantiles over an unbounded data stream within low memory and CPU bounds.
For more information and examples, see: http://godoc.org/github.com/bmizerany/perks
A very special thank you and shout out to Graham Cormode (Rutgers University), Flip Korn (AT&T Labs–Research), S. Muthukrishnan (Rutgers University), and Divesh Srivastava (AT&T Labs–Research) for their research and publication of Effective Computation of Biased Quantiles over Data Streams
Thank you, also:
FAQ:
Q: Why not move the quantile package into the project root? A: I want to add more packages to perks later.
Copyright (C) 2013 Blake Mizerany
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