do not evaluate tag expressions twice
do not evaluate tag expressions twice

raintank/metrictank,raintank/metrictank,replay/metrictank,raintank/metrictank,replay/metrictank,raintank/raintank-metric,raintank/raintank-metric,raintank/raintank-metric,raintank/metrictank,replay/metrictank,replay/metrictank