Convert string to bytes once only when doing string filtering. #1405
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This makes it slightly faster: name old time/op new time/op delta ContainsFilter-4 18.2ns ± 2% 9.8ns ± 1% -46.20% (p=0.000 n=10+8) name old alloc/op new alloc/op delta ContainsFilter-4 0.00B 0.00B ~ (all equal) name old allocs/op new allocs/op delta ContainsFilter-4 0.00 0.00 ~ (all equal) Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com>
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This is trivial change that moves conversion out of returned function. This makes it slightly faster: