slow LS - slow NFS ?

I'm seeing performance issue by running an LS command in some directories. These are NFS mounted shared disks. Sometimes, it is "faster", but the same still takes around 30 seconds then. Here is an example where it tool longer: $ date ; ls -l $APPLCSF/log | wc -l ; date Fri Jul  3 11:15:45 CEST 2020 93270 Fri Jul  3 11:17:19 CEST 2020 $ I find this unacceptable, and I'm looking for a solution EXCLUDING the "solution" to remove files. I know an LS will run faster if less files are present, that is not on discussion here.