[pjmlp]

TIMI is compiled at installation time usually, the bytecode format is used only as portable executable format.

While initially Java on AS/400 did take advantage of TIMI, IBM eventually moved away from it, into regular JVM design on now IBM i.

Most likely because IBM z doesn't use TIMI, rather language environments, and they want a more straight design, or due to Java dynamic capabilities using TIMI wasn't the best approach.

On AS/400 (IBM i), only Metal C, and the underlying kernel/firmware, written in a mix of PL.8, Modula-2 and C++, are pure native code.