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https://issues.apache.org/jira/browse/ARROW-6230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neal Richardson updated ARROW-6230:
-----------------------------------
Affects Version/s: 0.14.0
> [R] Reading in Parquet files are 20x slower than reading fst files in R
> -----------------------------------------------------------------------
>
> Key: ARROW-6230
> URL: https://issues.apache.org/jira/browse/ARROW-6230
> Project: Apache Arrow
> Issue Type: Improvement
> Components: R
> Affects Versions: 0.14.0
> Environment: Windows 10 Pro and Ubuntu
> Reporter: Zhuo Jia Dai
> Priority: Major
> Labels: parquet
> Attachments: image-2019-08-14-10-04-56-834.png
>
>
> *Problem*
> Loading any of the data I mentioned below is 20x slower than the fst format
> in R.
>
> *How to get the data*
> [https://loanperformancedata.fanniemae.com/lppub/index.html]
> Register and download any of these. I can't provide the data to you, and I
> think it's best you register.
>
> !image-2019-08-14-10-04-56-834.png!
>
> *Code*
> ```r
> path = "data/Performance_2016Q4.txt"
> library(data.table)
> library(arrow)
> a = data.table::fread(path, header = FALSE)
> fst::write_fst(a, "data/a.fst")
> arrow::write_parquet(a, "data/a.parquet")
> rm(a); gc()
> #read in test
> system.time(a <- fst::read_fst("data/a.fst")) # 4.61 seconds
> rm(a); gc()
> read in test
> system.time(a <- arrow::read_parquet("data/a.parquet") # 99.19 seconds
> ```
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