Default severity: warning
Converting both strings with strings.ToLower or strings.ToUpper allocates
intermediate strings and processes each input fully. strings.EqualFold
compares incrementally without those allocations and can stop at the first
mismatch.
Bad
if strings.ToLower(left) == strings.ToLower(right) { use() }Good
if strings.EqualFold(left, right) { use() }