BTW just three days ago eigensym was switched to a different Lapack
background function I think, so maybe we should try a brand new snapshot
for this.
It could always be that openblas has different optimizations for
different Lapack functions for your newer CPU.
cheers
sven
Using 2020a-git (2020-01-08) returns the same times. Also I run the script from either the desktop location or from the hard disk. No other program is running etc.
I attach my $sysinfo
? eval $sysinfo
bundle anonymous:
nproc = 12
blascore = "Haswell"
hostname = "DESKTOP-OFGVHSS"
os = "windows"
mpi = 0
blas = "openblas"
omp_num_threads = 12
ncores = 6
omp = 1
blas_parallel = "OpenMP"
mpimax = 12
wordlen = 64
if it could be of any value
Yiannis
OK I went back to my old PC (I have 2 I admit!!) and I use 2019d in both cases.
I get a ratio of 10 (less than half). But 'eigensym' does almost the same time while eiggen2 is much slower.
So in my new (and I guess better PC) with eigensym I get the same timeA but a much faster timeB from 'eiggen2'.
Riddle to be solved … :).
Same thing happens with 2020a-git in both machines
Thanks
Yiannis