Merge pull request #479 from murgatroid99/node_perf_test

Added a performance test

src/node/examples/perf_test.js

+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+var grpc = require('..');
+var testProto = grpc.load(__dirname + '/../interop/test.proto').grpc.testing;
+var _ = require('underscore');
+var interop_server = require('../interop/interop_server.js');
+
+function runTest(iterations, callback) {
+  var testServer = interop_server.getServer(0, false);
+  testServer.server.listen();
+  var client = new testProto.TestService('localhost:' + testServer.port);
+
+  function runIterations(finish) {
+    var start = process.hrtime();
+    var intervals = [];
+    var pending = iterations;
+    function next(i) {
+      if (i >= iterations) {
+        testServer.server.shutdown();
+        var totalDiff = process.hrtime(start);
+        finish({
+          total: totalDiff[0] * 1000000 + totalDiff[1] / 1000,
+          intervals: intervals
+        });
+      } else{
+        var deadline = new Date();
+        deadline.setSeconds(deadline.getSeconds() + 3);
+        var startTime = process.hrtime();
+        client.emptyCall({}, function(err, resp) {
+          var timeDiff = process.hrtime(startTime);
+          intervals[i] = timeDiff[0] * 1000000 + timeDiff[1] / 1000;
+          next(i+1);
+        }, {}, deadline);
+      }
+    }
+    next(0);
+  }
+
+  function warmUp(num) {
+    var pending = num;
+    for (var i = 0; i < num; i++) {
+      (function(i) {
+        client.emptyCall({}, function(err, resp) {
+          pending--;
+          if (pending === 0) {
+            runIterations(callback);
+          }
+        });
+      })(i);
+    }
+  }
+  warmUp(100);
+}
+
+function percentile(arr, percentile) {
+  if (percentile > 99) {
+    percentile = 99;
+  }
+  if (percentile < 0) {
+    percentile = 0;
+  }
+  return arr[(arr.length * percentile / 100)|0];
+}
+
+if (require.main === module) {
+  var count;
+  if (process.argv.length >= 3) {
+    count = process.argv[2];
+  } else {
+    count = 100;
+  }
+  runTest(count, function(results) {
+    var sorted_intervals = _.sortBy(results.intervals, _.identity);
+    console.log('count:', count);
+    console.log('total time:', results.total, 'us');
+    console.log('median:', percentile(sorted_intervals, 50), 'us');
+    console.log('90th percentile:', percentile(sorted_intervals, 90), 'us');
+    console.log('95th percentile:', percentile(sorted_intervals, 95), 'us');
+    console.log('99th percentile:', percentile(sorted_intervals, 99), 'us');
+    console.log('QPS:', (count / results.total) * 1000000);
+  });
+}
+
+module.exports = runTest;