From 0eaf189431b271928b0a3152317710eb046f1b1f Mon Sep 17 00:00:00 2001
From: Michael Bullington <michael@bullington.xyz>
Date: Tue, 9 Jun 2020 00:07:19 -0400
Subject: [PATCH 1/2] optimize parseLiteral for number-heavy JSON files (ala
 GeoJSON)

---
 src/impl/parser.ts | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/src/impl/parser.ts b/src/impl/parser.ts
index 462d494..aab0b8b 100644
--- a/src/impl/parser.ts
+++ b/src/impl/parser.ts
@@ -482,16 +482,21 @@ export function visit(text: string, visitor: JSONVisitor, options: ParseOptions
 	function parseLiteral(): boolean {
 		switch (_scanner.getToken()) {
 			case SyntaxKind.NumericLiteral:
-				let value = 0;
-				try {
-					value = JSON.parse(_scanner.getTokenValue());
-					if (typeof value !== 'number') {
+				const tokenValue = _scanner.getTokenValue();
+				let value = parseFloat(tokenValue);
+
+				if (isNaN(value)) {
+					try {
+						value = JSON.parse(tokenValue);
+						if (typeof value !== 'number') {
+							handleError(ParseErrorCode.InvalidNumberFormat);
+							value = 0;
+						}
+					} catch (e) {
 						handleError(ParseErrorCode.InvalidNumberFormat);
-						value = 0;
 					}
-				} catch (e) {
-					handleError(ParseErrorCode.InvalidNumberFormat);
 				}
+
 				onLiteralValue(value);
 				break;
 			case SyntaxKind.NullKeyword:

From 7505449c94ce59dc1db327949b71d1e7d7dcd91b Mon Sep 17 00:00:00 2001
From: Michael Bullington <michael@bullington.xyz>
Date: Tue, 9 Jun 2020 23:29:18 -0400
Subject: [PATCH 2/2] switch from parseFloat to Number

---
 src/impl/parser.ts | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/src/impl/parser.ts b/src/impl/parser.ts
index aab0b8b..fcae231 100644
--- a/src/impl/parser.ts
+++ b/src/impl/parser.ts
@@ -483,18 +483,11 @@ export function visit(text: string, visitor: JSONVisitor, options: ParseOptions
 		switch (_scanner.getToken()) {
 			case SyntaxKind.NumericLiteral:
 				const tokenValue = _scanner.getTokenValue();
-				let value = parseFloat(tokenValue);
+				let value = Number(tokenValue);
 
 				if (isNaN(value)) {
-					try {
-						value = JSON.parse(tokenValue);
-						if (typeof value !== 'number') {
-							handleError(ParseErrorCode.InvalidNumberFormat);
-							value = 0;
-						}
-					} catch (e) {
-						handleError(ParseErrorCode.InvalidNumberFormat);
-					}
+					handleError(ParseErrorCode.InvalidNumberFormat);
+					value = 0;
 				}
 
 				onLiteralValue(value);