use slice instead of replace for better performance

sokra · sokra · commit 1b6bb850e4b7 · 2018-05-19T12:24:17.000+02:00
diff --git a/lib/JsonParser.js b/lib/JsonParser.js
@@ -13,7 +13,7 @@ class JsonParser {
 	}
 
 	parse(source, state) {
-		const data = parseJson(source.replace(/^\ufeff/, ""));
+		const data = parseJson(source[0] === "\ufeff" ? source.slice(1) : source);
 		state.module.buildInfo.jsonData = data;
 		state.module.buildMeta.exportsType = "named";
 		if (typeof data === "object" && data)

Original file line number	Diff line number	Diff line change
`@@ -13,7 +13,7 @@ class JsonParser {`
`13`	`13`	`}`
`14`	`14`
`15`	`15`	`parse(source, state) {`
`16`		`- const data = parseJson(source.replace(/^\ufeff/, ""));`
	`16`	`+ const data = parseJson(source[0] === "\ufeff" ? source.slice(1) : source);`
`17`	`17`	`state.module.buildInfo.jsonData = data;`
`18`	`18`	`state.module.buildMeta.exportsType = "named";`
`19`	`19`	`if (typeof data === "object" && data)`