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# Benchmarks
Some benchmarks, run on an ancient Thinkpad running Intel Core 2 Duo at 2GHz.
|Implementation | Time (sec)| Factor |
|-------------------|-----------:|--------:|
| Markdown.pl | 2921.30 | 14606.5 |
| kramdown | 20.76 | 103.8 |
| PHP markdown | 20.475 | 102.4 |
| lunamark | 6.195 | 40.0 |
| cheapskate | 5.645 | 28.2 |
| peg-markdown | 5.330 | 26.7 |
| **commonmark.js** | 2.730 | 13.6 |
| marked | 1.870 | 9.4 |
| discount | 1.660 | 8.3 |
| **cmark** | 0.320 | 1.6 |
| sundown | 0.200 | 1.0 |
To run these benchmarks, use `make bench PROG=/path/to/program`.
The input text is a 10MB Markdown file built by concatenating 20 copies
of the Markdown source of the first edition of [*Pro
Git*](https://github.com/progit/progit/tree/master/en) by Scott Chacon.
`time` is used to measure execution speed.
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