Update: Reduce number of allocations by pre-determining size when easily possible.

Update: Reduce number of allocations by pre-determining size when easily possible.

There are several cases where the expected size can be calculated.
Pre-allocated the expected size to reduce reallocation and improve performance by reducing memory overhead.

I also noticed that the comment is no longer correct and that the not quoted check could be reversed.
Changing this simplified the code, slightly.