Trustin Lee 2183c129d1 Use FastThreadLocal for skipFlagsCache
Related: #3113

Motivation:

Because ChannelHandlerContext is most often instantiated by an I/O
thread, we can rely on thread-local variables to keep the skipFlags
cache, which should be faster than partitioned synchronized variable.

Modifications:

Use FastThreadLocal for skipFlagsCache instead of partitioned
synchronized map.

Result:

Less contention
2014-11-20 17:57:09 +09:00
..