AsyncLogger: avoid useless concatenations if debug is disabled

[jcodagnone]

Save same CPU cycles avoiding concatenating strings that wont be used when debug is disabled (also saves some GC cycles).

[danilosterrapid7]

You could add this call under the if as well... once debug is disabled there is no point in calling it. ;)

[jcodagnone]

dbg() will check if debug is enabled, so it wont be a gain (the gain is in avoiding the string concatenation).

[danilosterrapid7]

I knew it. But, even though you will reduce one if test. ;)

[m0wfo]

-1 Nope. Are the debug guards around accessors really a performance improvement? @jcodagnone Let's talk about setting up some JMH benchmarks for finding pain-points (and yes, you're probably correct in assuming there are some in addLineToQueue). But a PR without context is just uninformed and [I'm forced to presume] premature optimization; do you have any throughput data to inform this change?