The syntax parsing time and performance did not meet my expectations

[cmmjxh]

Hello, I have customized the syntax using Antlr4 (4.13.2), but when using the parser to parse, I found that the general performance loss for each syntax parsing is about 50ms. Our project can only allow us to control it within about 5ms. I am not sure if it is because our syntax definition is inaccurate, and the performance supported by Antlr4 can only reach this limit. Can you help answer my question?（java）
`grammar DataFusion;

@Header{
package org.example.code;
}

options {
language = Java;
}

// DataFusion 语法定义jql
jql: elements end ;

elements: element (',' element)* ; // Simplified to allow for easier parsing of multiple elements

element: ID ':' (strings | constant | function | expr) // Simplified and removed unnecessary alternatives
| all
| ignore
;

expr: term (op=('+'|'-') term)*
| factor (op=(''|'/') factor)
| number
| strings
| function
| '(' expr ')'
;

term: factor (op=('+'|'-') factor) *;
factor: number | strings | function | '(' expr ')' | ID;

function:
AGGOPER '(' argument ')'
| IFNULL '(' number ',' strings ',' argument ')'
| CONCAT '(' strings (',' strings)* ')'
;

argument: strings | number | expr | constant
;

number: INTEGER | FLOAT
;

strings : ID
;

end : ';';

constant: ''' ID ''' | '''''' | ''' (INTEGER | FLOAT) ''';

all : ''
| ID ''
;

ignore : '-$'ID | '-$'all;

AGGOPER: 'SUM' | 'sum' | 'AVG' | 'avg' | 'COUNT' | 'count' | 'MAX' | 'max' | 'MIN' | 'min'
;

IFNULL: 'IFNULL' | 'ifnull'
;

CONCAT: 'CONCAT' | 'concat';

FLOAT : '-'? DIGIT+ '.' DIGIT+ ;
fragment DIGIT : [0-9] ;
ID : [a-zA-Z0-9_$\u0080-\uffff.]+ ;
Grammar_EOF: ';' ;
WS: [ \t\r\n]+ -> skip;`
解析耗时：57ms

[kaby76]

The grammar you provide is not valid. It doesn't pass the Antlr Tool. Please use correct Markdown syntax for code blocks.

[jimidle]

The grammar looks highly ambiguous and precedence looks incorrect. Use the recognizer options to report ambiguities s you parse then fix the grammar. Then you can use SLL mode and should teach your required parsing times easily. You have to work at a grammar and understand it to get good performance

…

On Mon, Aug 26, 2024 at 06:41 Ken Domino ***@***.***> wrote: The grammar you provide is not valid. It doesn't pass the Antlr Tool. Please use correct Markdown syntax for code blocks. — Reply to this email directly, view it on GitHub <#4683 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAJ7TMDIBPNTIDXVDFSNJE3ZTMO67AVCNFSM6AAAAABNDDRLRKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDGMJQGEYTQMBXHA> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>