Don't build description string unless actually logging it

spec/time-reporter.coffee

@@ -18,41 +18,44 @@ class TimeReporter extends jasmine.Reporter
     suites = _.map(window.timedSuites, (key, value) -> [value, key])
     for suite in _.sortBy(suites, (suite) => -suite[1])[0...number]
       log "  #{suite[0]} (#{suite[1]}ms)"
+    undefined
 
   logLongestSpecs: (number=10, log) ->
     log ?= (line) -> console.log(line)
     log "Longest running specs:"
     for spec in _.sortBy(window.timedSpecs, (spec) -> -spec.time)[0...number]
-      log spec.description
+      log "#{spec.description} (#{spec.time}ms)"
+    undefined
 
   reportSpecStarting: (spec) ->
-    @stack = [spec.description]
+    stack = [spec.description]
     suite = spec.suite
     while suite
-      @stack.unshift suite.description
+      stack.unshift suite.description
       @suite = suite.description
       suite = suite.parentSuite
 
+    reducer = (memo, description, index) ->
+      if index is 0
+        "#{description}"
+      else
+        "#{memo}\n#{_.multiplyString('  ', index)}#{description}"
+    @description = _.reduce(stack, reducer, '')
     @time = new Date().getTime()
 
   reportSpecResults: (spec) ->
-    return unless @time? and @stack?
+    return unless @time? and @description?
 
     duration = new Date().getTime() - @time
-    reducer = (memo, description, index) ->
-      if index is 0
-        "#{description} (#{duration}ms)\n"
-      else
-        "#{memo}#{_.multiplyString('  ', index)}#{description}\n"
-    description = _.reduce(@stack, reducer, '')
 
     window.timedSpecs.push
-      description: description
+      description: @description
       time: duration
+
     if timedSuites[@suite]
       window.timedSuites[@suite] += duration
     else
       window.timedSuites[@suite] = duration
 
     @time = null
-    @stack = null
+    @description = null