Re: String interning (WAS: SAX2/Java: Towards a final form)
On Thu, 13 Jan 2000, David Brownell wrote: > > A java compiler could, for instance, take: > > > > lhs.equals(rhs) > > > > and compile it as > > > > ( lhs == rhs | lhs.equals(rhs) ) > > Any implementation of "equals" that doesn't > first test for "==" has serious problems; and > I include the String.equals implementations > up to JDK 1.1.6 or so when I say that. > > Even so, method invocation is never free, and it's > appropriate to ensure that it can be (sometimes) > eliminated directly in the source code. If I remember the rules, if the first member of an alternation is true, then the second member is not evaluated. Thus, the above would not incur a method invocation unless the strings were not interned. But, in general, I dig the point. Clark xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ or CD-ROM/ISBN 981-02-3594-1 Please note: New list subscriptions now closed in preparation for transfer to OASIS.
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