pmouawad commented on pull request #603:
URL: https://github.com/apache/jmeter/pull/603#issuecomment-654068489


   > My concerns are:
   > 
   >     1. "marker interfaces". The pattern was invented long ago when no 
other means were possible. Now we can have annotations and other means that 
enable better metadata tracking. Marker interfaces do make the maintenance more 
complicated, and it not clear why do you add interfaces to "sample listeners" 
only. For instance, do you intend to create "JMeterThreadBound..." for every 
JMeter component class type? Then we'll end up in 100 useless interfaces.
   
   As I said I am ok to switch to annotation in this case.
   > 
   > 
   > Then, as we move to async-based test plan execution, the notion of 
`JMeterThreadBound` would be even mooter.
   > 
   >     1. The test you use looks contrived. Does the change produce 
noticeable improvement for, say, HTTP testing?
   > 
   > 
   > I see you observe improvements like 1M -> 1.7M requests/sec when doing 
no-op test. Ok. What is the number of requests per second you can achieve on 
the same machine with a single HTTP sampler (or HTTP + regexp extractor)? Is it 
10K/sec?
   
   the No-op test is to only test the throughput of writing. 
   If I do a test with HTTP then it will involve other parameters.
   
   > Then the maximum possible rate after the improvement would be 
`1/(1/10K-1/(1.7M-1M))` == 10.1K/sec. Of course, I might be wrong, but it would 
be surprising if the end-users would observe more than say 2-5% improvement.
   > 
   
   The contention was really faced in a real life test with real HTTP test.
   The impact on test is very important and breaks the simulation. It's not 
only about throughput.
   Did you try the PR build ? 
   From where do you get this 2-5% improvements number ?
   
   
   > Of course, we can always rework or even undo the change, however, adding 
interfaces like `JMeterThreadBoundSampleListener` to the public API looks super 
weird.
   
   Ok,let's stick to annotations then


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