Instead of going through the whole dance with provider loading, context creation etc, just call EVP_MD_CTX_reset() to reuse the already-setup context, if any. This makes QCryptographicHash::reset() adhere to its noexcept specification again (assuming EVP_MD_CTX_reset() doesn't allocate state, and, despite its non-void return type, cannot fail on a valid context), and should greatly improve the speed of reset(), addData(), resultView() cycles. Pick-to: 6.5 Change-Id: I7c35b61cbeab1ffd6dd258e8389ea614d49e2e1e Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io> Reviewed-by: Jan Grulich <jgrulich@redhat.com> Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>