在 R 中将 data.frame 转换为分隔字符串的函数的高性能实现

Question

I am looking for a fast serialization function to convert a data.frame to a delimited string in R . At the moment I am using readr::format_tsv (Versions readr_2.0.0 vroom_1.5.3 ) for the conversion and I am wondering if there is a faster implementation available. For the example below the conversion takes around 4.4 seconds which is too slow for my purpose.

system.time()

   user  system elapsed 
  3.878   0.495   4.372 

Example

df= data.frame(replicate(400, runif(35000, min=0, max=100)))

system.time({
  tsv = readr::format_tsv(df)
})

Answer 1

性能问题得到解决： https : //github.com/r-lib/vroom/issues/377