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diff --git a/node_modules/mongodb/external-libs/bson/test/test_stackless_bson.js b/node_modules/mongodb/external-libs/bson/test/test_stackless_bson.js
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+++ b/node_modules/mongodb/external-libs/bson/test/test_stackless_bson.js
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+var Buffer = require('buffer').Buffer,
+  BSON = require('../bson').BSON,
+  Buffer = require('buffer').Buffer,
+  BSONJS = require('../../../lib/mongodb/bson/bson').BSON,
+  BinaryParser = require('../../../lib/mongodb/bson/binary_parser').BinaryParser,
+  Long = require('../../../lib/mongodb/bson/long').Long,
+  ObjectID = require('../../../lib/mongodb/bson/bson').ObjectID,
+  Binary = require('../../../lib/mongodb/bson/bson').Binary,
+  Code = require('../../../lib/mongodb/bson/bson').Code,  
+  DBRef = require('../../../lib/mongodb/bson/bson').DBRef,  
+  Symbol = require('../../../lib/mongodb/bson/bson').Symbol,  
+  Double = require('../../../lib/mongodb/bson/bson').Double,  
+  MaxKey = require('../../../lib/mongodb/bson/bson').MaxKey,  
+  MinKey = require('../../../lib/mongodb/bson/bson').MinKey,  
+  Timestamp = require('../../../lib/mongodb/bson/bson').Timestamp;
+  assert = require('assert');
+
+if(process.env['npm_package_config_native'] != null) return;
+ 
+console.log("=== EXECUTING TEST_STACKLESS_BSON ===");
+
+// Parsers
+var bsonC = new BSON([Long, ObjectID, Binary, Code, DBRef, Symbol, Double, Timestamp, MaxKey, MinKey]);
+var bsonJS = new BSONJS([Long, ObjectID, Binary, Code, DBRef, Symbol, Double, Timestamp, MaxKey, MinKey]);
+
+// Number of iterations for the benchmark
+var COUNT = 10000;
+// var COUNT = 1;
+// Sample simple doc
+var doc = {key:"Hello world", key2:"šđžčćŠĐŽČĆ", key3:'客家话', key4:'how are you doing dog!!'};
+// var doc = {};
+// for(var i = 0; i < 100; i++) {
+//   doc['string' + i] = "dumdyms fsdfdsfdsfdsfsdfdsfsdfsdfsdfsdfsdfsdfsdffsfsdfs";  
+// }
+
+// // Calculate size
+console.log(bsonC.calculateObjectSize2(doc));
+console.log(bsonJS.calculateObjectSize(doc));
+// assert.equal(bsonJS.calculateObjectSize(doc), bsonC.calculateObjectSize2(doc));
+
+// ----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// Benchmark calculateObjectSize
+// ----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+
+// Benchmark 1 JS BSON
+console.log(COUNT + "x (objectBSON = bsonC.calculateObjectSize(object))")
+start = new Date
+
+for (j=COUNT; --j>=0; ) {  
+  var objectBSON = bsonJS.calculateObjectSize(doc);
+}
+
+end = new Date
+var opsprsecond = COUNT / ((end - start)/1000);
+console.log("time = ", end - start, "ms -", COUNT / ((end - start)/1000), " ops/sec");
+
+// Benchmark 2 C++ BSON calculateObjectSize
+console.log(COUNT + "x (objectBSON = bsonC.calculateObjectSize(object))")
+start = new Date
+
+for (j=COUNT; --j>=0; ) {  
+  var objectBSON = bsonC.calculateObjectSize(doc);
+}
+
+end = new Date
+var opsprsecond = COUNT / ((end - start)/1000);
+console.log("time = ", end - start, "ms -", COUNT / ((end - start)/1000), " ops/sec");
+
+// Benchmark 3 C++ BSON calculateObjectSize2
+console.log(COUNT + "x (objectBSON = bsonC.calculateObjectSize2(object))")
+start = new Date
+
+for (j=COUNT; --j>=0; ) {  
+  var objectBSON = bsonC.calculateObjectSize2(doc);
+}
+
+end = new Date
+var opsprsecond = COUNT / ((end - start)/1000);
+console.log("time = ", end - start, "ms -", COUNT / ((end - start)/1000), " ops/sec");
+
+// // Serialize the content
+// var _serializedDoc1 = bsonJS.serialize(doc, true, false);
+// var _serializedDoc2 = bsonC.serialize2(doc, true, false);
+// console.dir(_serializedDoc1);
+// console.dir(_serializedDoc2);
+// assert.equal(_serializedDoc1.toString('base64'), _serializedDoc2.toString('base64'))
+// 
+// 
+// // Benchmark 1
+// console.log(COUNT + "x (objectBSON = bsonC.serialize(object))")
+// start = new Date
+// 
+// for (j=COUNT; --j>=0; ) {  
+//   // var objectBSON = bsonC.serialize2(doc, true, false);
+//   var objectBSON = bsonJS.serialize(doc, true, false);
+// }
+// 
+// end = new Date
+// var opsprsecond = COUNT / ((end - start)/1000);
+// console.log("bson size (bytes): ", objectbsonC.length);
+// console.log("time = ", end - start, "ms -", COUNT / ((end - start)/1000), " ops/sec");
+// console.log("MB/s = " + ((opsprsecond*objectbsonC.length)/1024));
+// 
+// // Benchmark 2
+// console.log(COUNT + "x (objectBSON = bsonC.serialize(object))")
+// start = new Date
+// 
+// for (j=COUNT; --j>=0; ) {  
+//   var objectBSON = bsonC.serialize2(doc, true, false);
+// }
+// 
+// end = new Date
+// var opsprsecond = COUNT / ((end - start)/1000);
+// console.log("bson size (bytes): ", objectbsonC.length);
+// console.log("time = ", end - start, "ms -", COUNT / ((end - start)/1000), " ops/sec");
+// console.log("MB/s = " + ((opsprsecond*objectbsonC.length)/1024));
+// 
+// // Benchmark 3
+// console.log(COUNT + "x (objectBSON = bsonC.serialize(object))")
+// start = new Date
+// 
+// for (j=COUNT; --j>=0; ) {  
+//   var objectBSON = bsonC.serialize(doc, true, false);
+// }
+// 
+// end = new Date
+// var opsprsecond = COUNT / ((end - start)/1000);
+// console.log("bson size (bytes): ", objectbsonC.length);
+// console.log("time = ", end - start, "ms -", COUNT / ((end - start)/1000), " ops/sec");
+// console.log("MB/s = " + ((opsprsecond*objectbsonC.length)/1024));