fix: improved performance to get the default dialect for #361

Author: U117293

java/src/main/java/io/cucumber/gherkin/GherkinDialectProvider.java

@@ -7,18 +7,19 @@
 
 public final class GherkinDialectProvider {
 
-    private final String defaultDialectName;
+    private final GherkinDialect defaultDialect;
 
     public GherkinDialectProvider(String defaultDialectName) {
-        this.defaultDialectName = requireNonNull(defaultDialectName);
+        this.defaultDialect = getDialect(defaultDialectName)
+                .orElseThrow(() -> new ParserException.NoSuchLanguageException(defaultDialectName, null));
     }
 
     public GherkinDialectProvider() {
         this("en");
     }
 
     public GherkinDialect getDefaultDialect() {
-        return getDialect(defaultDialectName).orElseThrow(() -> new ParserException.NoSuchLanguageException(defaultDialectName, null));
+        return defaultDialect;
     }
 
     public Optional<GherkinDialect> getDialect(String language) {