Add updated version of remove1.js test grabbed from ed

jstests/perf/remove1.js

@@ -0,0 +1,70 @@
+/**
+ *  Performance tests for removing ojects
+ */
+
+var removals = 100;
+var size = 500000;
+var collection_name = "remove_test";
+var msg = "Hello from remove test";
+
+function testSetup(dbConn) {
+    var t = dbConn[collection_name];
+    t.drop();
+    t.ensureIndex( { num : 1 } );
+
+    for (var i=0; i<size; i++){
+        t.save({ num : i, msg : msg });
+    }
+}
+
+function between( low, high, val, msg ) {
+    assert( low < val, msg );
+    assert( val < high, msg );
+}
+
+/**
+ *   Compares difference of removing objects from a collection if only includes
+ *   field that's indexed, vs w/ additional other fields
+ *
+ * @param dbConn
+ */
+function testRemoveWithMultiField(dbConn) {
+
+    var results = {};
+    var t = dbConn[collection_name];
+
+    testSetup(dbConn);
+
+    t.remove( {num:0 } );
+    results.indexOnly = Date.timeFunc(
+        function(){
+            for (var i = 1; i < removals; i++) {
+                t.remove({num : i});
+            }
+
+            t.findOne();
+        }
+    );
+
+    testSetup(dbConn);
+    
+    t.remove( {num: 0, msg: msg } );
+    results.withAnother = Date.timeFunc(
+        function(){
+            for (var i = 1; i < removals; i++) {
+                t.remove({num : i, msg : msg});
+            }
+
+            t.findOne();
+        }
+    );
+
+
+    between( 0.65, 1.35, (results.indexOnly / results.withAnother),
+            "indexOnly / withAnother (" + results.indexOnly + " / " + results.withAnother + " ) = " +
+            results.indexOnly /  results.withAnother + " not in [0.65, 1.35]" );
+}
+
+var db = connect( "ed_perf_remove1" );
+
+testRemoveWithMultiField(db);