Add option to debug memory usage

bin/hyperlink

@@ -40,6 +40,10 @@ var optimist = require('optimist'),
             default: 100,
             type: 'integer'
         })
+        .options('debug', {
+            describe: 'Print debugging information during the run',
+            type: 'boolean'
+        })
         .wrap(72)
         .argv;
 
@@ -81,5 +85,6 @@ hyperlink({
     excludePatterns: excludePatterns,
     recursive: commandLineOptions.recursive,
     verbose: commandLineOptions.verbose,
-    concurrency: commandLineOptions.concurrency
+    concurrency: commandLineOptions.concurrency,
+    memdebug: commandLineOptions.debug
 });

lib/index.js

@@ -5,6 +5,7 @@ var async = require('async');
 var request = require('request');
 var version = require('../package.json').version;
 var relationDebugDescription = require('./relationDebugDescription');
+var prettyBytes = require('pretty-bytes');
 
 var checkFragments = require('./transforms/checkFragments');
 
@@ -255,6 +256,11 @@ module.exports = function (options) {
     ag.on('warn', handleError);
     ag.on('error', handleError);
 
+    var memoryUsageBefore;
+    if (options.memdebug) {
+        memoryUsageBefore = process.memoryUsage();
+    }
+
     t.pipe(process.stdout);
     t.begin();
 
@@ -301,6 +307,15 @@ module.exports = function (options) {
         // .writeStatsToStderr()
         .run(function () {
             var results = t.close();
+
+            if (options.memdebug) {
+                var memoryUsage = process.memoryUsage();
+
+                Object.keys(memoryUsage).forEach(function (key) {
+                    console.error(key, prettyBytes(memoryUsage[key] - memoryUsageBefore[key]));
+                });
+            }
+
             process.exit(results.fail ? 1 : 0);
         });
 };

package.json

@@ -43,6 +43,7 @@
     "async": "^2.4.0",
     "lodash": "^4.17.4",
     "optimist": "^0.6.1",
+    "pretty-bytes": "^4.0.2",
     "request": "^2.81.0",
     "tap-render": "Munter/tap-render#0.1.7-patch1",
     "urltools": "^0.3.1"