benchmark: use strict mode

Apply strict mode to benchmark code.

PR-URL: https://github.com/nodejs/node/pull/5336
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

3 files changed, 3 insertions, 0 deletions

diff --git a/benchmark/fs/read-stream-throughput.js b/benchmark/fs/read-stream-throughput.js
index a181a2df60..6b6a392796 100644
--- a/benchmark/fs/read-stream-throughput.js
+++ b/benchmark/fs/read-stream-throughput.js
@@ -1,4 +1,5 @@
 // test the throughput of the fs.WriteStream class.
+'use strict';
 
 var path = require('path');
 var common = require('../common.js');
diff --git a/benchmark/fs/readfile.js b/benchmark/fs/readfile.js
index ac3241901b..0f39f64f57 100644
--- a/benchmark/fs/readfile.js
+++ b/benchmark/fs/readfile.js
@@ -1,6 +1,7 @@
 // Call fs.readFile over and over again really fast.
 // Then see how many times it got called.
 // Yes, this is a silly benchmark.  Most benchmarks are silly.
+'use strict';
 
 var path = require('path');
 var common = require('../common.js');
diff --git a/benchmark/fs/write-stream-throughput.js b/benchmark/fs/write-stream-throughput.js
index 9ff58389c7..a3eef67aa4 100644
--- a/benchmark/fs/write-stream-throughput.js
+++ b/benchmark/fs/write-stream-throughput.js
@@ -1,4 +1,5 @@
 // test the throughput of the fs.WriteStream class.
+'use strict';
 
 var path = require('path');
 var common = require('../common.js');