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Avoid unnecessary map allocation in parseExcludeInterfaces #257

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Avoid unnecessary map allocation in parseExcludeInterfaces #257

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16 changes: 8 additions & 8 deletions mockgen/mockgen.go
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Original file line number Diff line number Diff line change
Expand Up @@ -214,17 +214,17 @@ func parseMockNames(names string) map[string]string {

func parseExcludeInterfaces(names string) map[string]struct{} {
splitNames := strings.Split(names, ",")
namesSet := make(map[string]struct{}, len(splitNames))
var namesSet map[string]struct{}

for _, name := range splitNames {
if name == "" {
trimmed := strings.TrimSpace(name)
if trimmed == "" {
continue
}

namesSet[name] = struct{}{}
}

if len(namesSet) == 0 {
return nil
if namesSet == nil {
namesSet = make(map[string]struct{}, len(splitNames))
}
namesSet[trimmed] = struct{}{}
}

return namesSet
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