diff --git a/native/v8_extensions/native.js b/native/v8_extensions/native.js
index f55aec1b2..b2df39ba7 100644
--- a/native/v8_extensions/native.js
+++ b/native/v8_extensions/native.js
@@ -16,6 +16,9 @@ var $native = {};
   native function list(path, recursive);
   $native.list = list;
 
+  native function traverseTree(path, callback);
+  $native.traverseTree = traverseTree;
+
   native function isFile(path);
   $native.isFile = isFile;
 
diff --git a/native/v8_extensions/native.mm b/native/v8_extensions/native.mm
index 682ee84ae..6ad722377 100644
--- a/native/v8_extensions/native.mm
+++ b/native/v8_extensions/native.mm
@@ -9,6 +9,8 @@
 
 #import <iostream>
 
+#include <fts.h>
+
 namespace v8_extensions {
 
 NSString *stringFromCefV8Value(const CefRefPtr<CefV8Value>& value) {
@@ -95,6 +97,37 @@ bool Native::Execute(const CefString& name,
 
     return true;
   }
+  else if (name == "traverseTree") {
+      std::string argument = arguments[0]->GetStringValue().ToString();
+      int rootPathLength = argument.size() + 1;
+      char rootPath[rootPathLength];
+      strcpy(rootPath, argument.c_str());
+      char * const paths[] = {rootPath, NULL};
+
+      CefRefPtr<CefV8Value> function = arguments[1];
+
+      FTS *tree = fts_open(paths, FTS_NOCHDIR | FTS_NOSTAT, NULL);
+      if (tree != NULL) {
+          FTSENT *entry;
+          while ((entry = fts_read(tree)) != NULL) {
+              if (entry->fts_level == 0)
+                  continue;
+              if ((entry->fts_info & FTS_D) != 0 || (entry->fts_info & FTS_F) != 0) {
+                  CefV8ValueList args;
+                  int pathLength = entry->fts_pathlen - rootPathLength;
+                  char relative[pathLength + 1];
+                  relative[pathLength] = '\0';
+                  strncpy(relative, entry->fts_path + rootPathLength, pathLength);
+                  args.push_back(CefV8Value::CreateString(relative));
+                  args.push_back(CefV8Value::CreateBool((entry->fts_info & FTS_F) != 0));
+                  if (!function->ExecuteFunction(function, args)->GetBoolValue())
+                    fts_set(tree, entry, FTS_SKIP);
+              }
+          }
+      }
+
+      return true;
+  }
   else if (name == "list") {
     NSString *path = stringFromCefV8Value(arguments[0]);
     bool recursive = arguments[1]->GetBoolValue();
@@ -104,26 +137,22 @@ bool Native::Execute(const CefString& name,
       return true;
     }
 
-    NSFileManager *fm = [NSFileManager defaultManager];
-    NSArray *relativePaths = nil;
-    NSError *error = nil;
-
-    if (recursive) {
-      relativePaths = [fm subpathsOfDirectoryAtPath:path error:&error];
-    }
-    else {
-      relativePaths = [fm contentsOfDirectoryAtPath:path error:&error];
-    }
-
-    if (error) {
-      exception = [[error localizedDescription] UTF8String];
-    }
-    else {
-      retval = CefV8Value::CreateArray(relativePaths.count);
-      for (NSUInteger i = 0; i < relativePaths.count; i++) {
-        NSString *relativePath = [relativePaths objectAtIndex:i];
-        NSString *fullPath = [path stringByAppendingPathComponent:relativePath];
-        retval->SetValue(i, CefV8Value::CreateString([fullPath UTF8String]));
+    std::string argument = arguments[0]->GetStringValue().ToString();
+    char rootPath[argument.size() + 1];
+    strcpy(rootPath, argument.c_str());
+    char * const paths[] = {rootPath, NULL};
+    FTS *tree = fts_open(paths, FTS_NOCHDIR | FTS_NOSTAT, NULL);
+    retval = CefV8Value::CreateArray(0);
+    int index = 0;
+    if (tree != NULL) {
+      FTSENT *entry;
+      while ((entry = fts_read(tree)) != NULL) {
+        if (entry->fts_level == 0)
+          continue;
+        if (!recursive)
+          fts_set(tree, entry, FTS_SKIP);
+        if ((entry->fts_info & FTS_D) != 0 || (entry->fts_info & FTS_F) != 0)
+          retval->SetValue(index++, CefV8Value::CreateString(entry->fts_path));
       }
     }
 
diff --git a/src/app/project.coffee b/src/app/project.coffee
index 772b4279a..e4e9da775 100644
--- a/src/app/project.coffee
+++ b/src/app/project.coffee
@@ -51,13 +51,15 @@ class Project
     deferred = $.Deferred()
 
     filePaths = []
-    fs.traverseTree @getPath(), (path, prune) =>
-      if @ignorePath(path)
-        prune()
-      else if fs.isFile(path)
-        prune()
-        filePaths.push @relativize(path)
 
+    fs.traverseTree @getPath(), (path, isFile) =>
+      if @ignorePath(path)
+        false
+      else if isFile
+        filePaths.push path
+        false
+      else
+        true
     deferred.resolve filePaths
     deferred
 
diff --git a/src/stdlib/fs.coffee b/src/stdlib/fs.coffee
index 33d4872b4..393a1a88c 100644
--- a/src/stdlib/fs.coffee
+++ b/src/stdlib/fs.coffee
@@ -103,13 +103,7 @@ module.exports =
       @makeDirectory(path)
 
   traverseTree: (rootPath, fn) ->
-    recurse = null
-    prune = -> recurse = false
-
-    for path in @list(rootPath)
-      recurse = true
-      fn(path, prune)
-      @traverseTree(path, fn) if recurse and @isDirectory(path)
+    $native.traverseTree(rootPath, fn)
 
   lastModified: (path) ->
     $native.lastModified(path)