Enable rubocop Performance cops without issues

.rubocop.yml

@@ -46,6 +46,75 @@ Gemspec/RequiredRubyVersion:
 Performance/Caller:
   Enabled: true
 
+Performance/CaseWhenSplat:
+  Enabled: true
+
+Performance/Casecmp:
+  Enabled: true
+
+Performance/CompareWithBlock:
+  Enabled: true
+
+Performance/Count:
+  Enabled: true
+
+Performance/Detect:
+  Enabled: true
+
+Performance/DoubleStartEndWith:
+  Enabled: true
+
+Performance/EndWith:
+  Enabled: true
+
+Performance/FixedSize:
+  Enabled: true
+
+Performance/FlatMap:
+  Enabled: true
+
+Performance/LstripRstrip:
+  Enabled: true
+
+Performance/RangeInclude:
+  Enabled: true
+
+Performance/RedundantBlockCall:
+  Enabled: true
+
+Performance/RedundantMerge:
+  Enabled: true
+
+Performance/RedundantSortBy:
+  Enabled: true
+
+Performance/RegexpMatch:
+  Enabled: true
+
+Performance/ReverseEach:
+  Enabled: true
+
+Performance/Sample:
+  Enabled: true
+
+Performance/Size:
+  Enabled: true
+
+Performance/StartWith:
+  Enabled: true
+
+Performance/StringReplacement:
+  Enabled: true
+
+Performance/TimesMap:
+  Enabled: true
+
+Performance/UnfreezeString:
+  Enabled: true
+
+Performance/UriDefaultParser:
+  Enabled: true
+
 RSpec/AlignLeftLetBrace:
   Enabled: false