6767'use strict' ;
6868
6969const {
70- ArrayIsArray
70+ ArrayIsArray,
71+ ArrayPrototypePush,
72+ ArrayPrototypeSlice,
73+ ArrayPrototypeSort,
74+ ObjectPrototypeHasOwnProperty,
75+ StringPrototypeCharAt,
7176} = primordials ;
7277
7378const {
@@ -94,14 +99,14 @@ class StringCharIterator {
9499 * @return {string }
95100 */
96101 next ( ) {
97- return this . _string . charAt ( this . _position ++ ) ;
102+ return StringPrototypeCharAt ( this . _string , this . _position ++ ) ;
98103 }
99104
100105 /**
101106 * @return {string }
102107 */
103108 peek ( ) {
104- return this . _string . charAt ( this . _position ) ;
109+ return StringPrototypeCharAt ( this . _string , this . _position ) ;
105110 }
106111
107112 /**
@@ -158,7 +163,7 @@ class SourceMap {
158163 } else {
159164 this . #parseMap( this . #payload, 0 , 0 ) ;
160165 }
161- this . #mappings. sort ( compareSourceMapEntry ) ;
166+ ArrayPrototypeSort ( this . #mappings, compareSourceMapEntry ) ;
162167 }
163168
164169 /**
@@ -211,7 +216,7 @@ class SourceMap {
211216 /**
212217 * @override
213218 */
214- #parseMap = ( map , lineNumber , columnNumber ) => {
219+ #parseMap( map , lineNumber , columnNumber ) {
215220 let sourceIndex = 0 ;
216221 let sourceLineNumber = 0 ;
217222 let sourceColumnNumber = 0 ;
@@ -222,7 +227,7 @@ class SourceMap {
222227 for ( let i = 0 ; i < map . sources . length ; ++ i ) {
223228 const url = map . sources [ i ] ;
224229 originalToCanonicalURLMap [ url ] = url ;
225- sources . push ( url ) ;
230+ ArrayPrototypePush ( sources , url ) ;
226231 this . #sources[ url ] = true ;
227232
228233 if ( map . sourcesContent && map . sourcesContent [ i ] )
@@ -246,7 +251,7 @@ class SourceMap {
246251
247252 columnNumber += decodeVLQ ( stringCharIterator ) ;
248253 if ( isSeparator ( stringCharIterator . peek ( ) ) ) {
249- this . #mappings. push ( [ lineNumber , columnNumber ] ) ;
254+ ArrayPrototypePush ( this . #mappings, [ lineNumber , columnNumber ] ) ;
250255 continue ;
251256 }
252257
@@ -264,8 +269,11 @@ class SourceMap {
264269 name = map . names ?. [ nameIndex ] ;
265270 }
266271
267- this . #mappings. push ( [ lineNumber , columnNumber , sourceURL ,
268- sourceLineNumber , sourceColumnNumber , name ] ) ;
272+ ArrayPrototypePush (
273+ this . #mappings,
274+ [ lineNumber , columnNumber , sourceURL , sourceLineNumber ,
275+ sourceColumnNumber , name ]
276+ ) ;
269277 }
270278 } ;
271279}
@@ -320,8 +328,9 @@ function cloneSourceMapV3(payload) {
320328 }
321329 payload = { ...payload } ;
322330 for ( const key in payload ) {
323- if ( payload . hasOwnProperty ( key ) && ArrayIsArray ( payload [ key ] ) ) {
324- payload [ key ] = payload [ key ] . slice ( 0 ) ;
331+ if ( ObjectPrototypeHasOwnProperty ( payload , key ) &&
332+ ArrayIsArray ( payload [ key ] ) ) {
333+ payload [ key ] = ArrayPrototypeSlice ( payload [ key ] ) ;
325334 }
326335 }
327336 return payload ;
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