RFR: 8252518: cache result of CompilerToVM.getComponentType

[Vladimir Kozlov]

On Tue, 22 Sep 2020 02:59:37 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Linux perf profiles of CompileTheWorld with libgraal show that `CompilerToVM.getComponentType` is the most expensive
>> JVMCI VM entry point with almost 2% of total execution time:
>> + 1.87% 0.04% [.] c2v_getComponentType
>> + 0.54% 0.00% [.] c2v_installCode
>>      0.39% 0.00% [.] c2v_getResolvedJavaType0
>>      0.04% 0.00% [.] c2v_resolvePossiblyCachedConstantInPool
>>      0.03% 0.00% [.] c2v_interpreterFrameSize
>>      0.03% 0.01% [.] c2v_isAssignableFrom
>>      0.02% 0.00% [.] c2v_translate
>>      0.01% 0.00% [.] c2v_getIdentityHashCode
>> 
>> It's worth caching the result of this call.
>
> Marked as reviewed by kvn (Reviewer).

Good.

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PR: https://git.openjdk.java.net/jdk/pull/172