Any way to avoid JIT overhead for small programs when using AOT?

[Andrew Haley]

On 09/10/2018 04:58 AM, jayaprabhakar k wrote:

> I understand that at present AOT and -Xint are not compatible. I see the
> code explicitly disables AOT when -Xint is set
> <http://cr.openjdk.java.net/~kvn/8171137/webrev/raw_files/new/src/share/vm/aot/aotLoader.cpp>
> .
> 
> For extremely short programs, typically used by beginners learning Java, I
> see that CDS, AOT and Xint all help reduce the startup time. While CDS
> works with both AOT and Xint, multiplying the benefits, AOT and Xint do
> not.
> 
> Is there a way to keep both AOT + Xint, For classes/methods that are
> precompiled, use AOT code, and for others just interpret? If not now, would
> it be possible in the future?

Does it significantly help? If you precompile the Java library and your programs
are extremely short, you'll see very little compilation activity.

-- 
Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
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