Improve rake gettext:lint performance

lib/gitlab/i18n/po_linter.rb

@@ -24,7 +24,9 @@ module Gitlab
           return 'PO-syntax errors' => [parse_error]
         end
 
-        validate_entries
+        Gitlab::I18n.with_locale(locale) do
+          validate_entries
+        end
       end
 
       def parse_po
@@ -156,12 +158,10 @@ module Gitlab
       end
 
       def validate_translation(errors, entry)
-        Gitlab::I18n.with_locale(locale) do
-          if entry.has_plural?
-            translate_plural(entry)
-          else
-            translate_singular(entry)
-          end
+        if entry.has_plural?
+          translate_plural(entry)
+        else
+          translate_singular(entry)
         end
 
       # `sprintf` could raise an `ArgumentError` when invalid passing something
@@ -230,9 +230,7 @@ module Gitlab
         # This calls the C function that defines the pluralization rule, it can
         # return a boolean (`false` represents 0, `true` represents 1) or an integer
         # that specifies the plural form to be used for the given number
-        pluralization_result = Gitlab::I18n.with_locale(locale) do
-          FastGettext.pluralisation_rule.call(counter)
-        end
+        pluralization_result = FastGettext.pluralisation_rule.call(counter)
 
         case pluralization_result
         when false

spec/lib/gitlab/i18n/po_linter_spec.rb

@@ -461,9 +461,10 @@ RSpec.describe Gitlab::I18n::PoLinter do
       fake_metadata = double
       allow(fake_metadata).to receive(:forms_to_test).and_return(4)
       allow(linter).to receive(:metadata_entry).and_return(fake_metadata)
-      allow(linter).to receive(:locale).and_return('pl_PL')
 
-      numbers = linter.numbers_covering_all_plurals
+      numbers = Gitlab::I18n.with_locale('pl_PL') do
+        linter.numbers_covering_all_plurals
+      end
 
       expect(numbers).to contain_exactly(0, 1, 2)
     end