8234863: Increase default value of MaxInlineLevel

[Claes Redestad]

Hi,

running from the current RxJava tip, the specific microbenchmark you
refer to does no longer seem to exist.

I ran a few others at random on JDK 14 with -XX:MaxInlineLevel=9 and 15
and so far seen neither statistically significant improvements nor
regressions:

-XX:MaxInlineLevel=9
Benchmark                                Mode  Cnt       Score 
Error  Units
CallableAsyncPerf.observeOnCompletable  thrpt    5  141062.960 ± 
21482.159  ops/s
CallableAsyncPerf.observeOnFlowable     thrpt    5  129466.284 ± 
17678.970  ops/s
CallableAsyncPerf.observeOnMaybe        thrpt    5  141189.313 ± 
17751.146  ops/s
CallableAsyncPerf.observeOnObservable   thrpt    5  134234.044 ± 
20395.257  ops/s
CallableAsyncPerf.observeOnSingle       thrpt    5  144157.312 ± 
26030.366  ops/s

-XX:MaxInlineLevel=15
Benchmark                                Mode  Cnt       Score 
Error  Units
CallableAsyncPerf.observeOnCompletable  thrpt    5  146454.659 ± 
17943.591  ops/s
CallableAsyncPerf.observeOnFlowable     thrpt    5  133356.045 ± 
16149.803  ops/s
CallableAsyncPerf.observeOnMaybe        thrpt    5  136854.532 ± 
19836.464  ops/s
CallableAsyncPerf.observeOnObservable   thrpt    5  141694.341 ± 
11023.596  ops/s
CallableAsyncPerf.observeOnSingle       thrpt    5  145244.260 ± 
15513.685  ops/s

/Claes

On 2020-02-20 17:42, Claes Redestad wrote:
> Thanks for the heads up,
> 
> I'll seek approval to try out these microbenchmarks myself and see if
> I can reproduce.
> 
> /Claes
> 
> On 2020-02-20 16:43, Jiva, Azeem wrote:
>> Claes,
>>    I've been running the RxJava microbenchmarks[1] with JDK8 and JDK11 
>> with -XX:MaxInlineLevel=15 and there are a number of the 
>> microbenchmarks, specifically the ComputationSchedulerPerf:observeOn 
>> microbenchmark that regresses in performance.  In the case of this 
>> specific benchmark, 30% regression.  I've been looking into why, but 
>> no definitive answers as of yet.
>>
>>
>>
>>
>> [1]:  
>> https://urldefense.com/v3/__https://github.com/ReactiveX/RxJava__;!!GqivPVa7Brio!PUSXEoQwR0McFMQp4l7gDW0Tj5Y37fu0byZpc58M-kc0dk3z3yow8rUDtu25R0q3gkc$ 
>>
>>