Speeding up jmod

[Jonathan Gibbons]

On 05/02/2016 12:06 AM, Alan Bateman wrote:
>
> On 01/05/2016 17:02, Chris Hegarty wrote:
>> On 1 May 2016, at 14:50, Andrej Golovnin <andrej.golovnin at gmail.com> 
>> wrote:
>>> Hi Alan,
>>>
>>> If you would like to improve the performance a little bit more,
>>> you can make additional changes (see the patch) to JmodTask
>>> and maybe Claes can rerun his tests to see if it helps.
>> These look good too, even as general clean ups, but it would
>> be good to get some numbers on them.
>>
> Andrej - aside from the micro benchmarks, the real test is `make 
> jmods` where the tool runs N times (N = number of modules) to create 
> the packaged modules. Short lived tools have always been the JDK's 
> Achilles heel. It may be that we will eventually need a "jmod server", 
> like the sjavac server in the build today. Alternative it could be 
> wrapped in another tool that capable of creating several packaged 
> modules. There is a balance here as we also don't want to over 
> complicated things.
>
> -Alan


Rather than build "sjavac"-like server functionality into selected 
tools, maybe we could generalize the server part of sjavac to be a "tool 
server", capable of running any tool implementing a simple Tool interface.

-- Jon