On 02/01/2019 09:02, Claes Redestad wrote:
Hi,
during bootstrap we load and use at least two of the jrt, file and jar
URLStreamHandlers via URL$DefaultFactory. Avoiding use of reflection to
instantiate these slightly speed up bootstrap by reducing number of
classes loaded and doing fewer relatively expensive reflective
operations:
http://cr.openjdk.java.net/~redestad/8215990/jdk.00/
This looks okay to me and will continue to work when the protocol is not
in lower case (URL protocols/schemes are compared with regard to case).
While we're in the area then it would be nice to eliminate the use of
Class::newInstance too - if each of the built-in protocol handlers is
public with a public no-arg constructor then
getConstructor().newInstance() should do it.
A bigger job of work in this area is to replace the use of Hashtable
(handlers field). That's something for a bigger overhaul of course. We
shy-ed away from doing this in JDK 9 due to OSGi implementations hacking
the field directly.
-Alan
