The compression-level can be set in the range of -1..9, with 6 being
the default compression level. Levels above 6 will have higher
compression rates at the cost of more CPU and memory usage. Levels below
6 will use less CPU and memory at the cost of lower compression rates.
Specifies how much memory should be allocated for the internal compression
state. 1 uses minimum memory but is slow and reduces compression ratio;
9 uses maximum memory for optimal speed. The default value is 8.
Base two logarithm of the window size (the size of the history buffer). It
should be in the range 8..15. Larger values result in better compression
at the expense of memory usage. The default value is 15
Start a chunked conversion using the options given to the ZLibEncoder
constructor. While it accepts any Sink taking List's,
the optimal sink to be passed as sink is a ByteConversionSink.