Hi!
I recently wrote a quick test that does this:
private static int test_f(int i) { return i * 42; }
...
int z = 41;
for(int i = 0; i < 10000; ++i) { z = z*42; } // this loop runs
in X seconds
for(int i = 0; i < 10000; ++i) { z = test_f(z); } // this loop runs
in 10*X seconds
The results of this tests imples test_f() is not being inlined, even
though it really is a prime candidate for it. It should also be
possible to do this inlining at compile time.
There seems to be no option to control optimization level of the
compiler in Eclipse, perhaps optimizations like these are left to the
VM?
Does the Dalvik VM do inlining of functions at all, or did it just
decide to not inline this specific instance?
Curious to hear a response from someone more familiar with the Dalvik
VM than me.
Best regards,
Viktor Linder
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