Benchmarks of popular CSV parsers and formatters:
| Package | Version | Published | Parse | Format |
|---|---|---|---|---|
| csv-parse | 5.6.0 | 3 months ago | Yes | |
| csv-parser | 3.2.0 | 1 month ago | Yes | |
| csv-rex | 0.7.0 | 2 years ago | Yes | Yes |
| csv-streamify | 4.0.0 | 7 years ago | Yes | |
| csv-stringify | 6.5.2 | 3 months ago | Yes | |
| csvtojson | 2.0.10 | 6 years ago | Yes | |
| fast-csv | 5.0.2 | 4 months ago | Yes | Yes |
| papaparse | 5.5.2 | 1 month ago | Yes |
Your preferred CSV package missing? PRs welcome. Excluded packages in /docs/EXCLUDED.md.
The tests run on generated data files with 10 - 100 columns and 10K - 1M rows, both quoted and unquoted. The stream implementation for each library were used to keep comparison consistent, but can be slower compared to self chunking in certain use cases.
| columns x rows | cycles |
|---|---|
| 10 x 10,000 | 20 |
| 100 x 10,000 | 10 |
| 10 x 100,000 | 10 |
| 100 x 100,000 | 5 |
| 10 x 1,000,000 | 5 |
Benchmarked on GitHub Actions. Only the fastest 5 will be visualized.
| Package | 10x10K | 100x10K | 10x100K | 100x100K | 10x1000K |
|---|---|---|---|---|---|
| csv-rex | 24ms | 170ms | 214ms | 1,705ms | 2,149ms |
| papaparse | 42ms | 190ms | 394ms | 2,031ms | 4,113ms |
| csv-parser | 38ms | 349ms | 385ms | 3,719ms | 4,148ms |
| csvtojson | 57ms | 444ms | 555ms | 4,440ms | 5,626ms |
| csv-parse | 76ms | 666ms | 740ms | 6,783ms | 7,765ms |
| csv-streamify | 74ms | 735ms | 855ms | 8,302ms | 9,574ms |
| fast-csv | 106ms | 936ms | 1,081ms | 9,624ms | 11,229ms |
| Package | 10x10K | 100x10K | 10x100K | 100x100K | 10x1000K |
|---|---|---|---|---|---|
| csv-rex | 9ms | 43ms | 82ms | 428ms | 815ms |
| csvtojson | 33ms | 247ms | 325ms | 2,495ms | 3,300ms |
| csv-parser | 33ms | 312ms | 345ms | 3,330ms | 3,712ms |
| papaparse | 132ms | 62ms | 1,175ms | 558ms | 10,619ms |
| csv-parse | 60ms | 537ms | 624ms | 5,585ms | 6,360ms |
| csv-streamify | 68ms | 671ms | 783ms | 7,622ms | 8,848ms |
| fast-csv | 86ms | 757ms | 892ms | 7,982ms | 9,239ms |
| Package | 10x10K | 100x10K | 10x100K | 100x100K | 10x1000K |
|---|---|---|---|---|---|
| csv-rex | 22ms | 106ms | 221ms | 1,074ms | 2,273ms |
| csv-stringify | 25ms | 112ms | 246ms | 1,114ms | 2,478ms |
| fast-csv | 29ms | 132ms | 292ms | 1,255ms | 2,834ms |
- leanylabs who inspired the making of this repo with their article CSV Parsers Comparison.
- quickchart.io for the automation of the chart creation.
- GitHub for providing free use of Actions for running the benchmarks.