Blog Archives

Comparing performances of CSV to RDS, Parquet, and Feather file formats in R

Posted on May 8, 2022 by tomaztsql — 9 Comments

From the previous blogpost:– CSV or alternatives? Exporting data from SQL Server data to ORC, AVRO, Parquet, Feather files and store them into Azure data lake we have created Azure blob storage, connected secure connection using Python and started uploading files…

CSV or alternatives? Exporting data from SQL Server data to ORC, AVRO, Parquet, Feather files and store them into Azure data lake

Posted on May 6, 2022 by tomaztsql — 2 Comments

CSV data format is an old format and very common for data tasks, like import, export or storing. And when it comes performance of creating CSV file, reading and writing CSV files, how does it still stand against some other…

Little useless-useful R functions – benchmarking vectors and data.frames on simple GroupBy problem

Posted on March 21, 2022 by tomaztsql — 3 Comments

After an interesting conversation on using data. frames or strings (as a vector), I have decided to put this to a simple benchmark test. The problem is straightforward and simple: a MapReduce or Count with GroupBy. Problem Given a simple…

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