Compressed data length is bigger than the input data

[karthikprabhuA]

NSString *inputString = @"Hello World!";
inputData length = 12 bytes

compressedData length = 32 bytes

what is the problem ?

[nicklockwood]

The GZIP compression algorithm has a fixed overhead (e.g. it includes a a standard header so you can tell that it's a GZIP data file). It's not surprising that for very tiny amounts of data, this overhead increases the overall file size.

[karthikprabhuA]

thanks @nicklockwood