RFR: 8252518: cache result of CompilerToVM.getComponentType

[Tom Rodriguez]

On Tue, 15 Sep 2020 09:19:57 GMT, Doug Simon <dnsimon 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 never (Reviewer).

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