[mdt-ocl.dev] A benchmark

[Ed Willink <ed@xxxxxxxxxxxxx>]

Hi

Been thinking about a non-trivial simple scalable benchmark.

Tried:

Sequence{1..10000}->iterate(i : Integer; acc : Sequence(Integer) = 
Sequence{1, 1} | acc->including(acc->at(i) + acc->at(i+1)))->last()

In OCL Console:

After about 5 seconds: -2955459691282170344

In Xtext OCL Console:

After perhaps 1 second: 
88083137989997064605355872998857923445691333015376030932812485815888664307789011385238647061572694566755888008658862476758094375234981509702215595106015601812940878487465890539696395631360292400123725490667987980947195761919733084221263262792135552511961663188744083262743015393903228035182529922900769207624088879893951554938584166812233127685528968882435827903110743620870056104022290494963321073406865860606579792362403866826411642270661211435590340090149458419810817251120025713501918959350654895682804718752319215892119222907223279849851227166387954139546662644064653804466345416102543306712688251378793506564112970620367672131344559199027717813404940431009754143637417645359401155245658646088296578097547699141284451819782703782878668237441026255023475279003880007450550868002409533068098127495095667313120369142331519140185017719214501847645741030739351025342932514280625453085775191996236343792432215700850773568257988920265539647922172315902209901079830195949058505943508013044450503826167880993094540503572266189964694973263576375908606977788395730196227274629745722872833622300472769312273603346624292690875697438264265712313123637644491367875538847442013130532147345613099333195400845560466085176375175045485046787815133225349388996334014329318304865656815129208586686515835880811316065788759195646547703631454040090435955879604123186007481842117640574158367996845627012099571008761776991075470991386301988104753915798231741447012236434261594666985397841758348337030914623617101746431922708522824868155612811426016775968762121429282582582088871795463467796927317452368633552346819405423359738696980252707545944266042764236577381721803749442538053900196250284054406347238606575093877669323501452512412179883698552204038865069179867773579705703841178650618818357366165649529547898801198617541432893443650952033983923542592952070864044249738338089778163986683069566736505126466886304227253105034231716761535350441178724210841830855527586882822093246545813120624113290391593897765219320931179697869997243770533719319530526369830529543842405655495229382251039116426750156771132964376

which may not be right, but it's more convincing (Do just 1000, without 
the last and the OCL Console is clearly no BigInteger).

So the pivot model is convincingly faster and more accurate.

Could be much faster with an updating rather than recreating accumulator.

    Regards

        Ed