RFR (S): 8024616: JSR292: lazily initialize core NamedFunctions used for bootstrapping

[Vladimir Ivanov]

Chris, thanks!

Best regards,
Vladimir Ivanov

On 9/18/13 11:22 PM, Christian Thalinger wrote:
> Looks good.
>
> On Sep 11, 2013, at 4:24 AM, Vladimir Ivanov <vladimir.x.ivanov at oracle.com> wrote:
>
>> http://cr.openjdk.java.net/~vlivanov/8024616/webrev.00/
>> 75 lines changed: 14 ins; 2 del; 59 mod
>>
>> A small set of NamedFunctions is pre-initialized to allow JSR292 bootstrapping. After 8022595, which enabled JSR292 initialization during VM startup, they are instantiated even when JSR292 isn't used.
>>
>> It leads to unnecessary work being done and a regression in startup time (~20-25ms for HelloWorld application on my laptop). The major contribution to this time is bytecode compilation of LF's for preinitialized NamedFunctions.
>>
>> The fix is to factor NamedFunctions used for bootstrapping into an inner class to delay initialization till the first usage.
>>
>> After the fix, JSR292 pre-init duration goes down to 2-3ms (from 25ms) and no anonymous classes are produced, if JSR292 isn't used in the application.
>>
>> Testing: concurrent loading & init order tests for java.lang.invoke, JSR292 tests, octane.
>>
>> Best regards,
>> Vladimir Ivanov
>