log layer id when benchmarking

bin/carto

@@ -129,7 +129,7 @@ if (ext == '.mml') {
     }, compile);
 } else if (ext == '.mss') {
     var env = _({}).defaults({
-        benchmark: false,
+        benchmark: options.benchmark,
         validation_data: false,
         effects: []
     });
@@ -145,7 +145,12 @@ if (ext == '.mml') {
                 output.push(style.toXML(env));
             }
         });
-    console.log(output.join('\n'));
+    if (!options.benchmark) {
+        util.puts(output.join('\n'));
+    } else {
+        var duration = (+new Date) - start;
+        console.log('TOTAL: ' + (duration) + 'ms');
+    }
 } else {
     util.puts("carto: please pass either a .mml file or .mss file");
 }

lib/carto/renderer.js

@@ -51,6 +51,7 @@ carto.Renderer.prototype.render = function render(m, callback) {
     // Iterate through layers and create styles custom-built
     // for each of them, and apply those styles to the layers.
     m.Layer.forEach(function(l) {
+        if (env.benchmark) console.warn('processing layer: ' + l.id);
         l.styles = [];
         // Classes are given as space-separated alphanumeric strings.
         var classes = (l['class'] || '').split(/\s+/g);