Increased task speed about 5x by removing the gzip size comparison.

```
Uncompressed size: 198287 bytes.
Compressed size: 20114 bytes gzipped (101687 bytes minified).
```

Calculating the gzip size makes this task **5x slower** than it would be otherwise. 

I added the option `sizeInfo` for showing this information for those that find it useful. 

It is **off by default**, giving this task a 5x speed boost. This is a change from the original default behavior but I feel is important as performance issues are typically considered bugs and I haven't used any other tasks that found it necessary to show the before, after, and gzip sizes.