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returned=1 errno=0 peeraddr=140.82.121.6:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-10-11T21:28:07.717Z","updated_at":"2026-03-09T01:31:17.183Z","avatar_url":"https://github.com/knapply.png","language":null,"funding_links":[],"categories":[],"sub_categories":[],"readme":"---\ntitle: \"Read\"\nauthor: \"Brendan Knapp\"\ndate: \"10/8/2019\"\noutput: github_document\neditor_options: \n  chunk_output_type: console\n---\n\n```{r setup, include=FALSE}\nknitr::opts_chunk$set(echo = TRUE, message = FALSE, warning = FALSE)\n```\n\n\n\n```{r}\ndl_path \u003c- \"datasets/yellow_tripdata_2010-01.csv\"\n\nif (!file.exists(dl_path)) {\n  download.file(\n    \"https://s3.amazonaws.com/nyc-tlc/trip+data/yellow_tripdata_2010-01.csv\",\n    destfile = dl_path\n  )\n}\n```\n\n```{r}\nlibrary(data.table)\nlibrary(arrow)\nlibrary(scales)\nlibrary(microbenchmark)\nlibrary(ggplot2)\n```\n\n\n```{r}\ncol_names \u003c- c(\"vendor_id\", \"pickup_datetime\", \"dropoff_datetime\", \n               \"passenger_count\", \"trip_distance\", \"pickup_longitude\", \n               \"pickup_latitude\", \"rate_code\", \"store_and_fwd_flag\", \n               \"dropoff_longitude\", \"dropoff_latitude\", \"payment_type\", \n               \"fare_amount\", \"surcharge\", \"mta_tax\", \"tip_amount\", \n               \"tolls_amount\", \"total_amount\")\n\ninit \u003c- fread(dl_path)\ncolnames(init) \u003c- col_names\n\nbig_df \u003c- rbindlist(\n  replicate(n = 5, init, simplify = FALSE)\n)\n\nsetNames(comma(dim(big_df)), c(\"# rows\", \"# cols\"))\n```\n\n```{r}\ncsv_path \u003c- \"datasets/csvy-file.csv\"\ncsvy_path \u003c- \"datasets/csvy-file.csvy\"\nparquet_path \u003c- \"datasets/parquet-file.parquet\"\n\n\nfwrite(big_df, file = csv_path)\nfwrite(big_df, file = csvy_path)\nwrite_parquet(big_df, sink = parquet_path)\n\nnumber_bytes(\n  file.size(c(csv_path, csvy_path, parquet_path))\n)\n```\n\n```{r}\nres \u003c- microbenchmark::microbenchmark(\n  DT_csv = fread(csv_path, showProgress = FALSE),\n\n  DT_csvy = fread(csvy_path, showProgress = FALSE),\n  \n  arrow_parquet = read_parquet(parquet_path),\n  \n\n  times = 5\n)\n```\n\n\n```{r}\nres\n\nggplot2::autoplot(res)\n```\n\n\n```{r}\ndata.table::getDTthreads()\nsessionInfo()\n```\n\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fknapply%2Fdata.table-vs-parquet","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fknapply%2Fdata.table-vs-parquet","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fknapply%2Fdata.table-vs-parquet/lists"}