Missing an optimization opportunity when indexing maps by byte slices SCC-SA6001
Performance
Major
Autofix Map keys must be comparable, which precludes the use of byte slices. This
usually leads to using string keys and converting byte slices to strings.
Usually, converting a byte slice to a string needs to copy the data and
causes allocations. The compiler, however, recognizes m[string(b)] and uses the
data of b directly, without copying it, because it knows that the data can't
change during the map lookup.
Bad practice
k := string(b) // copies and allocates
println(m[k])
println(m[k])
Recommended
println(m[string(b)])
println(m[string(b)])