Code in JMeter JSR223 Sampler comments is executed

Please tell me why the code in comments (both /*something*/ and //something) is executed using JSR223 Sampler & BeanShell sampler? For example, I have:

and in the next JSR223 Sampler I have:

and the result is:

and the question is: why this code: "/${__setProperty(checkProperty, 50)};/" is executed regardless of that it is in comment and it is in wrong condition?

JMeter Functions are being executed in the place where they're found, no matter where it is, in Sampler label, comments section, sampler body, etc.

Actually inlining JMeter Functions and/or Variables into JSR223 scripts is not the best idea as

• it might conflict with Groovy's string interpolation syntax
• the function or variable might resolve into something causing script compilation failure or logic error
• and last but not the least Groovy will cache the first occurrence and use it for subsequent iterations

So if you need to set a property - use props.put() function like

props.put('foo', 'bar')

And finally I'm not sure that using props.clear() is a good idea because there are some pre-defined JMeter properties (you can check yourself using Debug Sampler and View Results Tree listener combination) and it might result into unexpected behaviour if a test element will be relying on that property existence and/or value