fix: catch min not found error
Merge branch 'version2' of https://github.com/HeinAtCERN/Varial into version2
Merge branch 'version2' of https://github.com/HeinAtCERN/Varial into version2
fix: 2d histos
Merge branch 'version2' of https://github.com/HeinAtCERN/Varial into version2
Revert "dbio with split root and info data"

This reverts commit aa0335648f866314b570718cf4368181d5e3c3df.
tune dbio for fast writing