Are there security/performance issues with backporting Java code from 1.8 to 1.5? [closed]

java,performance,security,backport

Here you can find a benchmark comparing JVM 1.6 to 7 and 8. I have an excerpt here: My observations: On the biggest dataset (Machine Reassignment B10), which dwarfs any of the other datasets in size, Java 8 is 20% faster than Java 7, which was already 17% faster than...

Backport Python 3.4's regular expression “fullmatch()” to Python 2

regex,python-3.4,python-2.x,backport

To make sure that the entire string matches, you need to use the \Z end-of-string anchor: def fullmatch(regex, string, flags=0): """Emulate python-3.4 re.fullmatch().""" return re.match("(?:" + regex + r")\Z", string, flags=flags) The \A anchor is not necessary since re.match() already anchors the match to the start of the string....