Finally, the optimized JavaIR is transformed back into Java source code and executed by a
Java compiler.
The Harissa environment integrates an optimizing off-line
Java compiler with an interpreter; the interpreter allows execution of dynamically loaded programs.
No such optimization can be performed in the Java code of Figure 17(b), since the
Java compiler cannot change the execution order of statements.
The author explains in easily-understood terms how to write programs for the JVM directly, without the aid of a
Java compiler. Security designers will learn how the JVM verification algorithm systems.
The speed-up is primarily attributable to Apple's use, as expected (CI No 3,408), of Symantec Corp's Just In Time
Java compiler for the PowerPC, including enhanced graphics, imaging, threading and network performance.
The symbolic dimension propagation for coverage analysis, described in Section 5.2.1, can be easily adapted in this context such that the
Java compiler could prove that the array bounds of a code segment S are covered by the bounds of a previous segment P, and thereby, avoid the generation of out-of-bound traps in the code segment S.
At issue was a
Java compiler, written by Microsoft, which Microsoft says contains none of Sun's intellectual property - meaning none of Sun's program code.
In order to support this, they've built COM support into their
Java compiler (Microsoft Visual J++).
SuperCede Inc, the fast
Java compiler company spun out of Paul Allen's Asymetrix Corp back in 1997 (CI No 3,199), has sold off its high performance Java Flash Compiler technology to rival company Instantiations Inc, on undisclosed terms.
"Microsoft engaged in changes to their development tools such that the output of their
Java compiler, if you followed their recommendations, produced something that wasn't cross platform," Gosling replied, "Microsoft took this level playing field we tried to create and carved out its part.
