From e0730eeaa5231841a7eba080c8170e41278c3c52 Mon Sep 17 00:00:00 2001
From: Brian White <mscdex@mscdex.net>
Date: Wed, 4 Feb 2015 11:11:48 -0500
Subject: [PATCH] benchmark: allow compare via fine-grained filters

Before this commit, only benchmark targets defined in Makefile could
be used. This commit allows execution of common.js directly and
passing of filter arguments directly, allowing you to run either a
subset of benchmarks or a single specific benchmark for comparison.

PR-URL: https://github.com/iojs/io.js/pull/711
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
---
 benchmark/compare.js | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/benchmark/compare.js b/benchmark/compare.js
index d6ad44922dd43d..edb116d0c64baa 100644
--- a/benchmark/compare.js
+++ b/benchmark/compare.js
@@ -1,10 +1,12 @@
 var usage = 'node benchmark/compare.js ' +
             '<node-binary1> <node-binary2> ' +
-            '[--html] [--red|-r] [--green|-g]';
+            '[--html] [--red|-r] [--green|-g] ' +
+            '[-- <type> [testFilter]]';
 
 var show = 'both';
 var nodes = [];
 var html = false;
+var benchmarks;
 
 for (var i = 2; i < process.argv.length; i++) {
   var arg = process.argv[i];
@@ -21,8 +23,15 @@ for (var i = 2; i < process.argv.length; i++) {
     case '-h': case '-?': case '--help':
       console.log(usage);
       process.exit(0);
+      break;
+    case '--':
+      benchmarks = [];
+      break;
     default:
-      nodes.push(arg);
+      if (Array.isArray(benchmarks))
+        benchmarks.push(arg);
+      else
+        nodes.push(arg);
       break;
   }
 }
@@ -65,7 +74,11 @@ function run() {
   env.NODE = node;
 
   var out = '';
-  var child = spawn('make', [runBench], { env: env });
+  var child;
+  if (Array.isArray(benchmarks) && benchmarks.length)
+    child = spawn(node, ['benchmark/common.js'].concat(benchmarks), { env: env });
+  else
+    child = spawn('make', [runBench], { env: env });
   child.stdout.setEncoding('utf8');
   child.stdout.on('data', function(c) {
     out += c;