I thought that comments were another thing where there was a balance with keeping things tiny. More text equals larger script files, which overall might be significant. A very well commented script might be twice the size of a sparsely commented one, or more, and uncomressed text isn't all the small, so I assume the TC developers want to strike a balance.
Anyway when this was first posted I took a look and was able to spot some optimisations in the script that were possible with much less significant changes to how the script operates.
# echo modified: ;time rebuildfstab-mod; echo original: ; time rebuildfstab
modified:
real 0m 0.40s
user 0m 0.07s
sys 0m 0.21s
original:
real 0m 0.63s
user 0m 0.23s
sys 0m 0.38s
But I haven't got around to testing that it really works the same in lots of different circumstances yet.