[squarecog]

You are doing regex matching in the Cascading code, but splitting on a character in the pangool code. The latter is obviously much faster. I don't know that that's the reason for the difference you observe, but it certainly can't hurt to fix that and make the user-supplied code more comparable.

[ferrerabertran]

Indeed that regex was problematic because it had a bug itself. We replaced that line by RegexSplitter and updated the benchmark page. Please shout if you notice something else wrong. Thanks.

[ivanprado]

Just for clarify, split() java function is using regexp for the split as well. The code of String.split() is:

return Pattern.compile(regex).split(this, limit);

The benchmark seems fair to me.