From 8d08be8a62c557f6d66ee4af2585c9a6498099a9 Mon Sep 17 00:00:00 2001
From: Paul van Brenk <paul.van.brenk@microsoft.com>
Date: Thu, 7 Apr 2016 16:06:29 -0700
Subject: [PATCH] use temp variable for current dir.

prevents calls to the host for every file.
---
 src/compiler/tsc.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/compiler/tsc.ts b/src/compiler/tsc.ts
index 9734ba6689b..c2199cf7345 100644
--- 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}`);
         }