benchmark: add progress indicator to compare.js

* Print the progress bar and the current benchmark to stderr
  when stderr is TTY and stdout is not.
* Allow cli arguments without values via setting.boolArgs
* Add --no-progress option

PR-URL: https://github.com/nodejs/node/pull/10823
Fixes: https://github.com/nodejs/node/issues/8659
Reviewed-By: Andreas Madsen <amwebdk@gmail.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/benchmark/common.js b/benchmark/common.js
index 4ce9501dd9..6a9b2ba0f7 100644
--- a/benchmark/common.js
+++ b/benchmark/common.js
@@ -128,6 +128,14 @@ Benchmark.prototype.http = function(options, cb) {
 
 Benchmark.prototype._run = function() {
   const self = this;
+  // If forked, report to the parent.
+  if (process.send) {
+    process.send({
+      type: 'config',
+      name: this.name,
+      queueLength: this.queue.length
+    });
+  }
 
   (function recursive(queueIndex) {
     const config = self.queue[queueIndex];
@@ -217,7 +225,8 @@ Benchmark.prototype.report = function(rate, elapsed) {
     name: this.name,
     conf: this.config,
     rate: rate,
-    time: elapsed[0] + elapsed[1] / 1e9
+    time: elapsed[0] + elapsed[1] / 1e9,
+    type: 'report'
   });
 };