Reintroduce fn that clears stack occasionally

- setTimeout will clear stack, prevent overflow. We run this once every
  thousand specs.
- Browser users will probably want a time-based clear rather than spec
  count based clear, as a thousand tests is typically quite slow. The
  reporter should provide this.

lib/jasmine-core/jasmine.js

@@ -524,6 +524,8 @@ jasmine.buildExpectationResult = function(params) {
     var self = this;
     var global = options.global || jasmine.getGlobal();
 
+    var encourageGC = options.encourageGarbageCollection || encourageGarbageCollection;
+
     this.clock = new jasmine.Clock(global, new jasmine.DelayedFunctionScheduler());
 
     var suiteConstructor = jasmine.Suite;
@@ -539,8 +541,6 @@ jasmine.buildExpectationResult = function(params) {
 
     this.reporter = new jasmine.MultiReporter();
 
-    this.updateInterval = jasmine.DEFAULT_UPDATE_INTERVAL;
-    this.defaultTimeoutInterval = jasmine.DEFAULT_TIMEOUT_INTERVAL;
     this.lastUpdate = 0;
     this.specFilter = function() {
       return true;
@@ -627,8 +627,11 @@ jasmine.buildExpectationResult = function(params) {
       function specResultCallback(result) {
         self.clock.uninstall();
         self.currentSpec = null;
-        suite.specComplete(result);
+        encourageGC(function() {
+          suite.specComplete(result);
+        });
       }
+
     };
 
     var queueConstructor = jasmine.Queue;
@@ -639,6 +642,18 @@ jasmine.buildExpectationResult = function(params) {
       return new suiteConstructor(self, description, specDefinitions, self.currentSuite, queueFactory, isSuite);
     };
 
+    var maximumSpecCallbackDepth = 100;
+    var currentSpecCallbackDepth = 0;
+    function encourageGarbageCollection(fn) {
+      currentSpecCallbackDepth++;
+      if (currentSpecCallbackDepth > maximumSpecCallbackDepth) {
+        currentSpecCallbackDepth = 0;
+        global.setTimeout(fn, 0);
+      } else {
+        fn();
+      }
+
+    }
   };
 
   //TODO: shim Spec addMatchers behavior into Env. Should be rewritten to remove globals, etc.

spec/node_suite.js

@@ -159,6 +159,7 @@ process.argv.forEach(function(arg) {
   }
 });
 
+// var specs = jasmine.getAllSpecFiles(__dirname + '/smoke', new RegExp("test.js$"));
 var specs = jasmine.getAllSpecFiles(__dirname, new RegExp("Spec.js$"));
 var domIndependentSpecs = [];
 for (var i = 0; i < specs.length; i++) {

src/core/Env.js

@@ -9,6 +9,8 @@
     var self = this;
     var global = options.global || jasmine.getGlobal();
 
+    var encourageGC = options.encourageGarbageCollection || encourageGarbageCollection;
+
     this.clock = new jasmine.Clock(global, new jasmine.DelayedFunctionScheduler());
 
     var suiteConstructor = jasmine.Suite;
@@ -24,8 +26,6 @@
 
     this.reporter = new jasmine.MultiReporter();
 
-    this.updateInterval = jasmine.DEFAULT_UPDATE_INTERVAL;
-    this.defaultTimeoutInterval = jasmine.DEFAULT_TIMEOUT_INTERVAL;
     this.lastUpdate = 0;
     this.specFilter = function() {
       return true;
@@ -112,8 +112,11 @@
       function specResultCallback(result) {
         self.clock.uninstall();
         self.currentSpec = null;
-        suite.specComplete(result);
+        encourageGC(function() {
+          suite.specComplete(result);
+        });
       }
+
     };
 
     var queueConstructor = jasmine.Queue;
@@ -124,6 +127,18 @@
       return new suiteConstructor(self, description, specDefinitions, self.currentSuite, queueFactory, isSuite);
     };
 
+    var maximumSpecCallbackDepth = 100;
+    var currentSpecCallbackDepth = 0;
+    function encourageGarbageCollection(fn) {
+      currentSpecCallbackDepth++;
+      if (currentSpecCallbackDepth > maximumSpecCallbackDepth) {
+        currentSpecCallbackDepth = 0;
+        global.setTimeout(fn, 0);
+      } else {
+        fn();
+      }
+
+    }
   };
 
   //TODO: shim Spec addMatchers behavior into Env. Should be rewritten to remove globals, etc.