Dynamically choose best chunk size

Try chunk sizes between 1 and 64, selecting the one which minimizes the number
of bytes used. 16, the previous constant, turned out to be a rather good choice,
with 5/9 of the datasets still using it.

Alphabetic     : 3036 bytes    (- 19 bytes)
Case_Ignorable : 2136 bytes
Cased          : 934 bytes
Cc             : 32 bytes      (- 11 bytes)
Grapheme_Extend: 1774 bytes
Lowercase      : 985 bytes
N              : 1225 bytes    (- 41 bytes)
Uppercase      : 934 bytes
White_Space    : 97 bytes      (- 43 bytes)
Total table sizes: 11153 bytes (-114 bytes)

0 files changed, 0 insertions, 0 deletions