This is a minor optimization and cleanup. It's mainly to reduce the code size for tests-suite
(which is a concern on Kawa due to annoying JVM limitations).

It mostly makes sense to merge this into the reference implementation to reduce
divergence from the Kawa version.

ChangeLog:

2017-04-09  Per Bothner  <xxxxxx@bothner.com>

	* testing.scm: Some minor performance improvements.
	Mainly foucusing on reducing bytecode size. testing.scm: Some minor performance improvements.

--
	--Per Bothner
xxxxxx@bothner.com   http://per.bothner.com/