build: remove tools/wrk from the tree

wrk is an optional tool that some of the http benchmarks uses. The removal
doesn't affect any users. Developers are assumed to install it before running
the tests.

This change reduces the tarball by 5%

PR-URL: https://github.com/iojs/io.js/pull/982
Reviewed-By: Rod Vagg <rod@vagg.org>

2 files changed, 2 insertions, 7 deletions

diff --git a/benchmark/README.md b/benchmark/README.md
index ab168911af..0568f35029 100644
--- a/benchmark/README.md
+++ b/benchmark/README.md
@@ -5,11 +5,7 @@ io.js APIs.
 
 ## prerequisites
 
-Most of the http benchmarks require `wrk` to be compiled beforehand.
-
-```sh
-make wrk
-```
+Most of the http benchmarks require `wrk` and `ab` being installed.
 
 ## How to run tests
 
diff --git a/benchmark/common.js b/benchmark/common.js
index 06f26d1ce3..2e3cedced3 100644
--- a/benchmark/common.js
+++ b/benchmark/common.js
@@ -79,14 +79,13 @@ function Benchmark(fn, options) {
 // benchmark an http server.
 Benchmark.prototype.http = function(p, args, cb) {
   var self = this;
-  var wrk = path.resolve(__dirname, '..', 'tools', 'wrk', 'wrk');
   var regexp = /Requests\/sec:[ \t]+([0-9\.]+)/;
   var url = 'http://127.0.0.1:' + exports.PORT + p;
 
   args = args.concat(url);
 
   var out = '';
-  var child = spawn(wrk, args);
+  var child = spawn('wrk', args);
 
   child.stdout.setEncoding('utf8');