Improved regex performance of C-like strings and JS regexps

Author: Golmote

components/prism-clike.js

@@ -9,7 +9,7 @@ Prism.languages.clike = {
 			lookbehind: true
 		}
 	],
-	'string': /("|')(\\\n|\\?.)*?\1/,
+	'string': /("|')(\\[\s\S]|(?!\1)[^\\])*\1/,
 	'class-name': {
 		pattern: /((?:(?:class|interface|extends|implements|trait|instanceof|new)\s+)|(?:catch\s+\())[a-z0-9_\.\\]+/i,
 		lookbehind: true,

components/prism-clike.min.js

@@ -6,7 +6,7 @@ Prism.languages.javascript = Prism.languages.extend('clike', {
 
 Prism.languages.insertBefore('javascript', 'keyword', {
 	'regex': {
-		pattern: /(^|[^/])\/(?!\/)(\[.+?]|\\.|[^/\r\n])+\/[gimyu]{0,5}(?=\s*($|[\r\n,.;})]))/,
+		pattern: /(^|[^/])\/(?!\/)(\[.+?]|\\.|[^/\\\r\n])+\/[gimyu]{0,5}(?=\s*($|[\r\n,.;})]))/,
 		lookbehind: true
 	}
 });

components/prism-javascript.js

@@ -548,7 +548,7 @@ Prism.languages.clike = {
 			lookbehind: true
 		}
 	],
-	'string': /("|')(\\\n|\\?.)*?\1/,
+	'string': /("|')(\\[\s\S]|(?!\1)[^\\])*\1/,
 	'class-name': {
 		pattern: /((?:(?:class|interface|extends|implements|trait|instanceof|new)\s+)|(?:catch\s+\())[a-z0-9_\.\\]+/i,
 		lookbehind: true,
@@ -583,7 +583,7 @@ Prism.languages.javascript = Prism.languages.extend('clike', {
 
 Prism.languages.insertBefore('javascript', 'keyword', {
 	'regex': {
-		pattern: /(^|[^/])\/(?!\/)(\[.+?]|\\.|[^/\r\n])+\/[gimyu]{0,5}(?=\s*($|[\r\n,.;})]))/,
+		pattern: /(^|[^/])\/(?!\/)(\[.+?]|\\.|[^/\\\r\n])+\/[gimyu]{0,5}(?=\s*($|[\r\n,.;})]))/,
 		lookbehind: true
 	}
 });