On Mon, Feb 25, 2013 at 2:32 PM, Don Stewart <span dir="ltr">&lt;<a href="mailto:dons00@gmail.com" target="_blank">dons00@gmail.com</a>&gt;</span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

<p dir="ltr">Cassava is quite new, but has the same goals as lazy-csv.</p>
<p dir="ltr">Its about a year old now - <a href="http://blog.johantibell.com/2012/08/a-new-fast-and-easy-to-use-csv-library.html" target="_blank">http://blog.johantibell.com/2012/08/a-new-fast-and-easy-to-use-csv-library.html</a></p>


<p dir="ltr">I know Johan has been working on the benchmarks of late - it would be very good to know how the two compare in features</p></blockquote><div>I whipped together a quick benchmark: <a href="https://github.com/tibbe/cassava/blob/master/benchmarks/Benchmarks.hs">https://github.com/tibbe/cassava/blob/master/benchmarks/Benchmarks.hs</a></div>

<div><br></div><div>To run, check out the cassava repo on GitHub and run: cabal configure --enable-benchmarks &amp;&amp; cabal build &amp;&amp; cabal bench</div><div><br></div><div>Here are the results (all the normal caveats for benchmarking applies):</div>

<div><br></div><div><div>benchmarking positional/decode/presidents/without conversion</div><div>mean: 62.85965 us, lb 62.56705 us, ub 63.26101 us, ci 0.950</div><div>std dev: 1.751446 us, lb 1.371323 us, ub 2.295576 us, ci 0.950</div>

<div><br></div><div>benchmarking positional/decode/streaming/presidents/without conversion</div><div>mean: 93.81925 us, lb 91.14701 us, ub 98.19217 us, ci 0.950</div><div>std dev: 17.20842 us, lb 11.58690 us, ub 23.41786 us, ci 0.950</div>

<div><br></div><div>benchmarking comparison/lazy-csv</div><div>mean: 133.2609 us, lb 132.4415 us, ub 135.3085 us, ci 0.950</div><div>std dev: 6.193178 us, lb 3.123661 us, ub 12.83148 us, ci 0.950</div><div><br></div></div>

<div>The two first set of numbers are for cassava (in the all-at-once vs streaming mode). The last set is for lazy-csv.</div><div><br></div><div>The feature sets of the two libraries are quite different. Both do basic CSV parsing (with some extensions).</div>

<div><br></div><div> * lazy-csv parses CSV data to something akin to [[ByteString]], but with a heavy focus on error recovery and precise error messages.</div><div> * cassava parses CSV data to [a], where a is a user-defined type that represents a CSV record. There are options to recover from *type conversion* errors, but not from malformed CSV. cassava has several parsing modes: incremental for parsing interleaved with I/O, streaming for lazy parsing (with or without I/O), and all-at-once parsing for when you want to hold all the data in memory.</div>

<div><br></div><div>-- Johan</div><div><br></div></div>