> Once upon a midnight dreary, while I {pon}ered It's a visual demonstration how gzip works. The first line says it all. 'pon' matches the bytes in 'upon', the

> Once upon a midnight dreary, while I {pon}ered It's a visual demonstration how gzip works. The first line says it all. 'pon' matches the bytes in 'upon', the first first instance, thus it's pointer to those bytes instead of "duplicating" the pattern. As the text goes on, there are more matches, thus more pointers.