introduced benchmarks on publishing messages

README.md

@@ -48,3 +48,32 @@ func main() {
 	<-ctx.Done()
 }
 ```
+
+## Topic Benchmarks
+
+So far GubGub implements 2 kinds of topics:
+
+  * **SyncTopic** - Publishing blocks until the message was delivered. 
+  Subscribers speed and number **will** have a direct impact the publishing performance.
+  Under the right conditions (few and fast subscribers) this is the most performant topic.
+
+  * **AsyncTopic** - Publishing schedules the message to be eventually delivered. 
+  Subscribers speed and number **will not** directly impact the publishing perfomance at the cost of some publishing overhead.
+  This is generally the most scalable topic.
+
+The following benchmarks are just for reference on how the number of subscribers and their speed impact the publishing performance:
+
+```
+BenchmarkAsyncTopic_Publish/10_NoOp_Subscribers-8         	 2047338	       498.7 ns/op
+BenchmarkAsyncTopic_Publish/100_NoOp_Subscribers-8        	 3317646	       535.0 ns/op
+BenchmarkAsyncTopic_Publish/1K_NoOp_Subscribers-8         	 3239110	       578.9 ns/op
+BenchmarkAsyncTopic_Publish/10K_NoOp_Subscribers-8        	 1871702	       691.2 ns/op
+BenchmarkAsyncTopic_Publish/10_Slow_Subscribers-8         	 2615269	       433.4 ns/op
+BenchmarkAsyncTopic_Publish/20_Slow_Subscribers-8         	 3127874	       470.4 ns/op
+BenchmarkSyncTopic_Publish/10_NoOp_Subscribers-8          	24740354	        59.69 ns/op
+BenchmarkSyncTopic_Publish/100_NoOp_Subscribers-8         	 4135681	       488.9 ns/op
+BenchmarkSyncTopic_Publish/1K_NoOp_Subscribers-8          	  474122	      4320 ns/op
+BenchmarkSyncTopic_Publish/10K_NoOp_Subscribers-8         	   45790	     35583 ns/op
+BenchmarkSyncTopic_Publish/10_Slow_Subscribers-8          	  357253	      3393 ns/op
+BenchmarkSyncTopic_Publish/20_Slow_Subscribers-8          	  179725	      6688 ns/op
+```