Github user jloisel commented on the issue:
https://github.com/apache/jmeter/pull/221
> Why do you think synchronized CSS cache is the bottleneck then?
I saw a race condition in the existing implementation and fixed it
following the [Boy scouts
principle](http://programmer.97things.oreilly.com/wiki/index.php/The_Boy_Scout_Rule).
It's simply not working properly: the CPU can go crazy if the cache is full
when many virtual users are executing. If the requirement is that the code
doesn't need to work, then sure, I can make an implementation that gives
instant results.
Anyway, I'll be okay with any decision being made, I'm not getting any
reward for pushing Guava inside JMeter :+1:
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