How to speed up JavaParser

Question

I'm using JavaParser v3.13.5 to build AST from an expressions. I have spotted that parsing expression even simple like Objects.equals(a, b) takes up too much time (~0.15 s). Are there any options, besides ParserConfiguration , to speed up parsing?

EDIT

Code to reproduce results:

JavaParser javaParser = new JavaParser(
        new ParserConfiguration()
                .setStoreTokens(false)
                .setAttributeComments(false)
                .setDoNotAssignCommentsPrecedingEmptyLines(true)
                .setIgnoreAnnotationsWhenAttributingComments(true)
                .setLexicalPreservationEnabled(true)
                .setPreprocessUnicodeEscapes(false)
                .setLanguageLevel(LanguageLevel.RAW)
                .setCharacterEncoding(Providers.UTF8));

String strExpr = "Objects.equals(a, b)";

long start = System.currentTimeMillis();
//Expression expr = StaticJavaParser.parseExpression(strExpr); // even slower...
ParseResult<Expression> parseResult = javaParser.parseExpression(strExpr); // slow...
long end = System.currentTimeMillis();

System.out.println((double) (end-start)/1000);

Is there any method which can be overriden to suppress some unnecessary validations or something else?

Answer 1

也许您可以禁用示例中未使用的 LexicalPreservation。

Answer 2

Actually (JP version 3.16.3) takes 2983.4 nano seconds to parse this statement.

 String code = "Objects.equals(a, b);";
 long start = System.nanoTime();
 Statement stmt = StaticJavaParser.parseStatement(code);
 long end = System.nanoTime();
 System.out.println((double) (end-start)/1000);