From a1c37161ba3952f6d73bca08723c7b61150be2b4 Mon Sep 17 00:00:00 2001
From: Florin Iucha <florin@signbit.net>
Date: Sat, 13 Jun 2020 00:00:53 -0400
Subject: [PATCH] [Core] Avoid the special-casing of the first line

This special case creates a 20x slowdown on the lexing because the
function atStartOfInput() which returns true exactly once and false
thereafter is invoked for each token.
---
 src/main/antlr/SamXLexer.g4 | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/main/antlr/SamXLexer.g4 b/src/main/antlr/SamXLexer.g4
index 579bcc3..2379e28 100644
--- a/src/main/antlr/SamXLexer.g4
+++ b/src/main/antlr/SamXLexer.g4
@@ -188,9 +188,7 @@ SPACES : [ \t]+ -> channel(WHITESPACE) ;
 COMMENT : '%' ~[\r\n\f]* -> channel(COMMENTS) ;
 
 NEWLINE
- : ( {atStartOfInput()}?   SPACES
-   | ( '\r'? '\n' | '\r' | '\f' ) SPACES?
-   )
+ : ( '\r'? '\n' | '\r' | '\f' ) SPACES?
    {
       if (ignoreNewLinesInConditions)
       {