Remove intermediary during concatenation

OneDrive Build · OneDrive Build · commit ce3e87d9c5cf · 2021-05-10T16:49:08.000-07:00
diff --git a/src/compiler/sourcemap.ts b/src/compiler/sourcemap.ts
@@ -265,12 +265,10 @@ namespace ts {
         }
 
         function serializeMappings(): void {
-            const segments: string[] = [];
             for (let i = 0, len = mappingCharCodes.length; i < len; i += 1024) {
-                segments.push(String.fromCharCode.apply(undefined, mappingCharCodes.slice(i, i + 1024)));
+                mappings += String.fromCharCode.apply(undefined, mappingCharCodes.slice(i, i + 1024));
             }
             mappingCharCodes.length = 0;
-            mappings += segments.join("");
         }
 
         function toJSON(): RawSourceMap {

Original file line number	Diff line number	Diff line change
`@@ -265,12 +265,10 @@ namespace ts {`
`265`	`265`	`}`
`266`	`266`
`267`	`267`	`function serializeMappings(): void {`
`268`		`- const segments: string[] = [];`
`269`	`268`	`for (let i = 0, len = mappingCharCodes.length; i < len; i += 1024) {`
`270`		`- segments.push(String.fromCharCode.apply(undefined, mappingCharCodes.slice(i, i + 1024)));`
	`269`	`+ mappings += String.fromCharCode.apply(undefined, mappingCharCodes.slice(i, i + 1024));`
`271`	`270`	`}`
`272`	`271`	`mappingCharCodes.length = 0;`
`273`		`- mappings += segments.join("");`
`274`	`272`	`}`
`275`	`273`
`276`	`274`	`function toJSON(): RawSourceMap {`