use temp variable for current dir.

Paul van Brenk · Paul van Brenk · commit 8d08be8a62c5 · 2016-04-07T16:06:29.000-07:00
prevents calls to the host for every file.
diff --git a/src/compiler/tsc.ts b/src/compiler/tsc.ts
@@ -19,8 +19,10 @@ namespace ts {
             return;
         }
 
+        const currentDir = sys.getCurrentDirectory();
+
         for (const file of files) {
-            const filepath = getNormalizedAbsolutePath(file, sys.getCurrentDirectory());
+            const filepath = getNormalizedAbsolutePath(file, currentDir);
 
             sys.write(`TSFILE: ${filepath}${sys.newLine}`);
         }

Original file line number	Diff line number	Diff line change
`@@ -19,8 +19,10 @@ namespace ts {`
`19`	`19`	`return;`
`20`	`20`	`}`
`21`	`21`
	`22`	`+ const currentDir = sys.getCurrentDirectory();`
	`23`	`+`
`22`	`24`	`for (const file of files) {`
`23`		`- const filepath = getNormalizedAbsolutePath(file, sys.getCurrentDirectory());`
	`25`	`+ const filepath = getNormalizedAbsolutePath(file, currentDir);`
`24`	`26`
`25`	`27`	sys.write(`TSFILE: ${filepath}${sys.newLine}`);
`26`	`28`	`}`