From e03c2e705dcc928bff89fc0fb3407a79c924f43e Mon Sep 17 00:00:00 2001
From: Ali Mahdavi <alihmahdavi@gmail.com>
Date: Sat, 9 Sep 2023 16:31:02 +0300
Subject: [PATCH] Performance improvements

Array join operation becomes very heavy when the array gets bigger. This change will significantly improve the performance for large queries.
---
 mysql-import.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mysql-import.js b/mysql-import.js
index 03cffff..d94dfce 100755
--- a/mysql-import.js
+++ b/mysql-import.js
@@ -485,7 +485,8 @@ class queryParser extends stream.Writable{
 	
 	// Check to see if a new delimiter is being assigned
 	checkNewDelimiter(char){
-		var buffer_str = this.buffer.join('').toLowerCase().trim();
+		var buffer_str = '';
+    		if (this.buffer.length < 10) buffer_str = this.buffer.join('').toLowerCase().trim();
 		if(buffer_str === 'delimiter' && !this.quoteType){
 			this.seekingDelimiter = true;
 			this.buffer = [];