I don't see the problem. It's obvious what the chart conveys if you stop to think for a moment (at least speaking for myself, I'm used to looking at graphs with

I don't see the problem. It's obvious what the chart conveys if you stop to think for a moment (at least speaking for myself, I'm used to looking at graphs with a logarithmic time scale, and didn't think about it). In fact, it's reasonable that a linear improvement in compressed size should require an exponential increase in time and memory.