gap> file:=HapFile("data247.txt");;
gap> Read(file);;
gap> F:=ThickeningFiltration(T,25);;
gap> S:=List([1..15],i->ChildCreate());;
gap> N:=[0,1,2];;
gap> Exec("date +%s");P:=ParallelPersistentBettiNumbers(F,N,S);;Exec("date +%s");
1717160785
1717161285

gap> Exec("date +%s");Q:=PersistentBettiNumbersAlt(F,N);;Exec("date +%s");
1717161528
1717162276
gap> speedup:=1.0*(1717162276-1717161528)/(1717161285-1717160785);
1.496
