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bench !
September 19th 2018
" bench.r-lib.org
Jim Hester
CC-BY-4.0
A new take on benchmarking
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Why
benchmark?
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"premature optimization is the
root of all evil."
- Donald Knuth
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"A good programmer… will be wise
to look carefully at the critical
code; but only a!er that code has
been identified."
- Donald Knuth
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"All (tools) should be designed to
provide (us) with feedback
indicating what parts of (our)
programs are costing the most"
- Donald Knuth
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bench::mark()
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bench::mark()
1. High precision timers (ns)
2. Memory allocations
3. Number and type of R garbage
collections
4. Result equality
5. Adaptive stopping
6. Statistics filter GC effects
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bench::mark()
1. Human readable times
2. Human readable memory sizes
3. Full results / timings / GCs in list-
cols
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bench::press()
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bench::press()
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bench::plot()
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ggplot2::autoplot(results)
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bench.r-lib.org
install.packages("bench")
jimhester_
jimhester
[email protected]