FFM performance tweaks

[Brian S O'Neill]

I tested with the -XX:+StressIncrementalInlining option and it tends to 
slow down the warmup period, but overall performance isn't improved. In 
one case it appeared to be about 5% slower overall.

On 2024-11-22 10:03 AM, Maurizio Cimadamore wrote:

>>
>> Having no other (obvious) way to affect inlining in a product JVM, one
>> workaround that did work was -XX:+StressIncrementalInlining (with some
>> variance due to randomization of should_delay_inlining()). Not sure why
>> this is a product flag, but it does make a huge difference. Everything
>> in demo_draw_build_cmd gets fully inlined and GC activity drops to
>> nothing, with either the JNI or FFM backends.
> This is an intersting finding! I'd be curious if this could also be 
> replicated in Brian's tuple database benchmark.
>>