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setDT extremely slow for very wide input #5426

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MichaelChirico opened this issue Jul 31, 2022 · 0 comments · Fixed by #5427
Closed

setDT extremely slow for very wide input #5426

MichaelChirico opened this issue Jul 31, 2022 · 0 comments · Fixed by #5427
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@MichaelChirico
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DT = replicate(1e7, 1, simplify = FALSE)
system.time(setDT(DT))
#    user  system elapsed 
#  23.043   0.216  23.261
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Move some setDT validation checks to C Rdatatable/data.table
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@MichaelChirico