[isabelle-dev] Slow builds due to excessive heap images

Fabian Immler immler at in.tum.de
Thu Nov 2 16:03:13 CET 2017

I should have sent the message below also to isabelle-dev, sorry about that.
Has anything changed about integers in Poly/ML 5.7.1?

Lorenz_C0 did slow down by a factor of 5, which I find quite extreme.


> Am 28.10.2017 um 23:57 schrieb Fabian Immler <immler at in.tum.de>:
> Lorenz_C0 is one of those "much slower" sessions.
> If it helps, this is how I would characterize it:
> It is essentially one long computation where the code (IIRC about 15000 lines in SML) was generated in the parent session Lorenz_Approximation via @{computation_check ...}). The computation depends heavily on IntInf operations (but mostly in the <64 bit range)
> Fabian
>> Am 28.10.2017 um 22:45 schrieb Makarius <makarius at sketis.net>:
>> On 28/10/17 22:26, Makarius wrote:
>>> We are presently testing Poly/ML 5.7.1 by default (see
>>> Isabelle/aefaaef29c58) and there are already interesting performance
>>> figures, e.g. see:
>>> http://isabelle.in.tum.de/devel/build_status
>>> http://isabelle.in.tum.de/devel/build_status/Linux_A
>>> http://isabelle.in.tum.de/devel/build_status/AFP
>> The daily "AFP slow" timing has arrived just now, 4h hours later than
>> with Poly/ML 5.6:
>> http://isabelle.in.tum.de/devel/build_status/AFP_slow_64bit_6_threads
>> I still need to investigate, why some sessions require much longer now.
>> It might be due massive amounts of generated code.
>> 	Makarius
>> _______________________________________________
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