JuliaParallel / JuliaParallel/DTables.jl
[DTable] Negative groupby scaling with threads
Open
performance
table interface
- Dominant language
- Julia
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Description
Noticed this in my benchmarks
Table shows results for 2, 4, 8 and 16 threads and their comparisons against times from 2-thread config
Other ops mostly scale well
Either the groupby algo is messed up or the scheduler doesn't handle it well
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