Tilemap collision working but needs speeding up

node_modules/grunt/custom-gruntfile.js

@@ -0,0 +1,21 @@
+module.exports = function(grunt) {
+  grunt.log.writeln('foo', 'bar', 'baz');
+
+  grunt.initConfig({
+    clean: {
+      all: [
+        'deep/**',
+      ],
+      exclude: [
+        'deep/**',
+        '!deep/deep.txt'
+      ],
+    }
+  });
+
+  grunt.registerMultiTask('clean', function() {
+    this.filesSrc.forEach(function(filepath) {
+      console.log('delete', filepath);
+    });
+  });
+};