Hello, still investigating, I discovered that depending on the HOME variable, I get this two different behaviours.
FAST (invalid HOME) :~/src/gitlab.com/soleil-data-treatment/infra-config/sandbox/pv2$ time HOME='' dscverify --verbose libcerf_2.4-2.dsc libcerf_2.4-2.dsc: gpg: Signature faite le sam. 05 août 2023 21:06:00 CEST gpg: avec la clef RSA B415360F591EB6DD73AFFB83D30DECD2599322FC gpg: Bonne signature de « Roland Mas <lola...@debian.org> » [inconnu] gpg: Attention : utilisation d'une clef sans confiance. Good signature found validating libcerf_2.4.orig.tar.bz2 validating libcerf_2.4-2.debian.tar.xz All files validated successfully. real 0m0,149s user 0m0,087s sys 0m0,061s SLOW (the right HOME) :~/src/gitlab.com/soleil-data-treatment/infra-config/sandbox/pv2$ time dscverify --verbose libcerf_2.4-2.dsc libcerf_2.4-2.dsc: gpg: Signature faite le sam. 05 août 2023 21:06:00 CEST gpg: avec la clef RSA B415360F591EB6DD73AFFB83D30DECD2599322FC gpg: Bonne signature de « Roland Mas <lola...@debian.org> » [inconnu] gpg: Attention : utilisation d'une clef sans confiance. Good signature found validating libcerf_2.4.orig.tar.bz2 validating libcerf_2.4-2.debian.tar.xz All files validated successfully. real 0m4,604s user 0m0,107s sys 0m0,051s