Grip Cache

The Grip cache is one form of internal cache that ZipStream utilises to 
boost performance. 

Basically, a compressed file that has the Grip cache option, will be 
retained in the Virtual File Cache memory as uncompressed data for a 
period of time after its last access. 

The benefit of this is that any subsequent accesses within the Grip time 
period, will avoid the decompression delay. 

Currently the default Grip period is 1 (one) minute. 

It is not recommended to use the Grip cache in all situations as this may 
result in very large Swapper file space requirements. 

Note:   

 1. This cache operates independently to the other ZipStream caches. 

 2. The maximum cache size is configurable with the ZipStream Control 
    Panel. 

 3. Files are never cached if they have been modified. 

 4. Files that have been modified retain their Grip cache option.