Reduce memory allocations with pooled memory

[prat0088]

What do you think about replacing lines that could allocate large amounts of memory, like this

EnyimMemcachedCore/Enyim.Caching/Memcached/Protocol/Text/GetHelper.cs

Line 51 in 2b27236

byte[] allData = new byte[length];

with ArrayPool or similar? It would take a lot of pressure off the GC, especially for values larger than 85KB that will be stored on Large Object Heap, eventually pausing your application when reclaimed.

GC pauses can become an issue if you have a high-throughput, low-latency application pushing large amounts of data.

[prat0088]

Would you consider a pull request that uses rented bytes from ArrayPool wrapped in an IDisposable?