[nradov]

The Java code is defective. It's not checking for double quotes. The CSV format allows for commas inside column values by surrounding with double quotes, and then you can also put double quotes within such values by escaping them as double double quotes. Fix those defects and the Java code will be a little slower.

With modern JVMs, Java can occasionally actually be faster than native compiled languages due to dynamic optimization at runtime.

[dalke]

A few minutes ago (and after your comment) one of the commenters of that issue tested against Apache Commons CSV and found that Java was 1.9x faster than Go, rather than the original 3x: https://github.com/golang/go/issues/16791#issuecomment-24456...

[merb]

actually the java one is still amazing since it's a cold jvm. when it would be a big file I would think that java is far ahead of both. with an aggressive jit. maybe pypy is faster than all 3 :D