Is there any difference between original re2 and re2J

[Amish Asthana]

Hi

We are planning to use re2 for Java.

One can see two option :

a) Use re2J ( Download using Maven)

b) On the net one also see : https://github.com/logentries/re2-java , which from what we can see provide Java wrapper by calling inherent libs. C++ libs of RE2.

So a question  if they are same, functionality wise and performance wise. Or does re2-java provide more functionality which re2J does not provide.

regards and thanks

amish

[Alan Donovan]

They are not the same.

The wrapper around the C++ implementation has both DFA and NFA matching engines and many optimizations, and its interface is byte-oriented.  It may be faster for many inputs, though you'd have to measure it.  It has a native code dependency.

The Java implementation has only an NFA matcher, and is rune- (Unicode code point) oriented, so it cannot support \C.  It does not require native code.

[Amish Asthana]

Thanks a lot Alan, appreciate it.

regards and thanks

amish