use rspec :performance tag

spec/codecs/json.rb

@@ -18,7 +18,7 @@ describe LogStash::Codecs::JSON do
       end
     end
 
-    it "should be fast", :if => ENV["SPEEDTEST"] do
+    it "should be fast", :performance => true do
       json = '{"message":"Hello world!","@timestamp":"2013-12-21T07:01:25.616Z","@version":"1","host":"Macintosh.local","sequence":1572456}'
       iterations = 500000
       count = 0
@@ -36,7 +36,7 @@ describe LogStash::Codecs::JSON do
       insist { count } == iterations
       puts "codecs/json speed: #{iterations/duration}/sec"
     end
-    
+
     context "processing plain text" do
       it "falls back to plain text" do
         decoded = false

spec/event.rb

@@ -106,7 +106,7 @@ describe LogStash::Event do
 
     end
 
-    it "should be fast?", :if => ENV["SPEEDTEST"] do
+    it "should be fast?", :performance => true do
       2.times do
         start = Time.now
         100000.times { subject["[j][k1]"] }
@@ -175,7 +175,7 @@ describe LogStash::Event do
     end
   end
 
-  it "timestamp parsing speed", :if => ENV["SPEEDTEST"] do
+  it "timestamp parsing speed", :performance => true do
     warmup = 10000
     count = 1000000
 

spec/filters/date_performance.rb

@@ -5,7 +5,7 @@ puts "Skipping date tests because this ruby is not jruby" if RUBY_ENGINE != "jru
 describe LogStash::Filters::Date, :if => RUBY_ENGINE == "jruby" do
   extend LogStash::RSpec
 
-  describe "speed test of date parsing", :if => ENV["SPEEDTEST"] do
+  describe "speed test of date parsing", :performance => true do
     it "should be fast" do
       event_count = 100000
       min_rate = 4000

spec/filters/grok.rb

@@ -423,7 +423,7 @@ describe LogStash::Filters::Grok do
     end
   end
 
-  describe "performance test", :if => ENV["SPEEDTEST"] do
+  describe "performance test", :performance => true do
     event_count = 100000
     min_rate = 4000
 

spec/filters/kv.rb

@@ -102,7 +102,7 @@ describe LogStash::Filters::KV do
 
   end
 
-  describe "speed test", :if => ENV["SPEEDTEST"] do
+  describe "speed test", :performance => true do
     count = 10000 + rand(3000)
     config <<-CONFIG
       input {

spec/speed.rb

@@ -1,6 +1,6 @@
 require "test_utils"
 
-describe "speed tests" do
+describe "speed tests", :performance => true do
   extend LogStash::RSpec
   count = 1000000