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@zygoon
A "problem" with >current< CPUs support of RV Vector spec is that majority of today's CPU have no Vector support or spec 0.7 support (not official).

Vecctor spec v1.0 was not finalized several years ago, when RV CPUs manufacturers decided not to wait any longer and designed and produced current CPU generation -> with either no or v0.7.* spec support. There is minimal to no compiler support for these optimizations, so this has potentially big impact on performance.